diff --git a/installer.cfg b/installer.cfg
index 326bac6..77e75eb 100644
--- a/installer.cfg
+++ b/installer.cfg
@@ -1,11 +1,7 @@
-[general]
-tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
-tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
-
 [database]
 # Select database engine : postgres or mysql
-#engine = postgres
-engine = mysql
+engine = postgres
+#engine = mysql
 host = 127.0.0.1
 install = true
 
@@ -34,8 +30,6 @@ devmode = false
 [amavis]
 enabled = true
 user = amavis
-home_dir = /var/lib/amavis
-config_dir = /etc/amavis/conf.d
 max_servers = 1
 
 dbname = amavis
@@ -73,7 +67,7 @@ message_size_limit = 11534336
 
 [spamassassin]
 enabled = true
-config_dir = /etc/spamassassin
+config_dir = /etc/mail/spamassassin
 
 dbname = spamassassin
 dbuser = spamassassin
@@ -83,4 +77,3 @@ dbpassword = password
 enabled = true
 config_dir = /etc/uwsgi
 nb_processes = 2
-socket_path = /var/run/uwsgi/app/modoboa_instance/socket
diff --git a/modoboa_installer/database.py b/modoboa_installer/database.py
index 8609673..84bf12b 100644
--- a/modoboa_installer/database.py
+++ b/modoboa_installer/database.py
@@ -4,6 +4,7 @@ import os
 import pwd
 import stat
 
+from . import package
 from . import utils
 
 
@@ -26,7 +27,7 @@ class Database(object):
 
     def install_package(self):
         """Install database package if required."""
-        utils.install_system_packages(self.packages)
+        package.backend.install_many(self.packages[package.backend.FORMAT])
         utils.exec_cmd("service {} start".format(self.service))
 
 
@@ -34,13 +35,26 @@ class PostgreSQL(Database):
 
     """Postgres."""
 
-    packages = ["postgresql", "postgresql-server-dev-all"]
+    packages = {
+        "deb": ["postgresql", "postgresql-server-dev-all"],
+        "rpm": ["postgresql-server", "postgresql-devel"]
+    }
     service = "postgresql"
 
     def __init__(self, config):
         super(PostgreSQL, self).__init__(config)
         self._pgpass_done = False
 
+    def install_package(self):
+        """Install database if required."""
+        package.backend.install_many(self.packages[package.backend.FORMAT])
+        if package.backend.FORMAT == "rpm":
+            utils.exec_cmd("postgresql-setup initdb")
+            pattern = "s/^host(.+)ident$/host$1md5/"
+            cfgfile = "/var/lib/pgsql/data/pg_hba.conf"
+            utils.exec_cmd("perl -pi -e '{}' {}".format(pattern, cfgfile))
+        utils.exec_cmd("service {} start".format(self.service))
+
     def _exec_query(self, query, dbname=None, dbuser=None, dbpassword=None):
         """Exec a postgresql query."""
         cmd = "psql"
@@ -107,14 +121,17 @@ class MySQL(Database):
 
     """MySQL backend."""
 
-    packages = ["mysql-server", "libmysqlclient-dev"]
+    packages = {
+        "deb": ["mysql-server", "libmysqlclient-dev"],
+        "rpm": ["mariadb", "mariadb-devel"],
+    }
     service = "mysql"
 
     def install_package(self):
         """Preseed package installation."""
-        utils.preconfigure_package(
+        package.backend.preconfigure(
             "mysql-server", "root_password", "password", self.dbpassword)
-        utils.preconfigure_package(
+        package.backend.preconfigure(
             "mysql-server", "root_password_again", "password", self.dbpassword)
         super(MySQL, self).install_package()
 
diff --git a/modoboa_installer/package.py b/modoboa_installer/package.py
new file mode 100644
index 0000000..841cda6
--- /dev/null
+++ b/modoboa_installer/package.py
@@ -0,0 +1,105 @@
+"""Package management related tools."""
+
+import re
+
+from . import utils
+
+
+class Package(object):
+    """Base classe."""
+
+    def __init__(self, dist_name):
+        """Constructor."""
+        self.dist_name = dist_name
+
+    def preconfigure(self, name, question, qtype, answer):
+        """Empty method."""
+        pass
+
+
+class DEBPackage(Package):
+    """DEB based operations."""
+
+    FORMAT = "deb"
+
+    def __init__(self, dist_name):
+        super(DEBPackage, self).__init__(dist_name)
+        self.index_updated = False
+
+    def update(self):
+        """Update local cache."""
+        if self.index_updated:
+            return
+        utils.exec_cmd("apt-get update --quiet")
+        self.index_updated = True
+
+    def preconfigure(self, name, question, qtype, answer):
+        """Pre-configure a package before installation."""
+        line = "{0} {0}/{1} {2} {3}".format(name, question, qtype, answer)
+        utils.exec_cmd("echo '{}' | debconf-set-selections".format(line))
+
+    def install(self, name):
+        """Install a package."""
+        self.update()
+        utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(name))
+
+    def install_many(self, names):
+        """Install many packages."""
+        self.update()
+        utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(
+            " ".join(names)))
+
+    def get_installed_version(self, name):
+        """Get installed package version."""
+        code, output = utils.exec_cmd(
+            "dpkg -s {} | grep Version".format(name), capture_output=True)
+        match = re.match(r"Version: \d:(.+)-\d", output.decode())
+        if match:
+            return match.group(1)
+        return None
+
+
+class RPMPackage(Package):
+    """RPM based operations."""
+
+    FORMAT = "rpm"
+
+    def __init__(self, dist_name):
+        """Initialize backend."""
+        super(RPMPackage, self).__init__(dist_name)
+        if "centos" in dist_name:
+            self.install("epel-release")
+
+    def install(self, name):
+        """Install a package."""
+        utils.exec_cmd("yum install -y --quiet {}".format(name))
+
+    def install_many(self, names):
+        """Install many packages."""
+        utils.exec_cmd("yum install -y --quiet {}".format(" ".join(names)))
+
+    def get_installed_version(self, name):
+        """Get installed package version."""
+        code, output = utils.exec_cmd(
+            "rpm -qi {} | grep Version".format(name), capture_output=True)
+        match = re.match(r"Version\s+: (.+)", output.decode())
+        if match:
+            return match.group(1)
+        return None
+
+
+def get_backend():
+    """Return the appropriate package backend."""
+    distname = utils.dist_name()
+    backend = None
+    if distname in ["debian", "ubuntu"]:
+        backend = DEBPackage
+    elif "centos" in distname:
+        backend = RPMPackage
+    else:
+        raise NotImplementedError(
+            "Sorry, this distribution is not supported yet.")
+    return backend(distname)
+
+
+backend = get_backend()
diff --git a/modoboa_installer/python.py b/modoboa_installer/python.py
index 060b7b7..ffb2e3c 100644
--- a/modoboa_installer/python.py
+++ b/modoboa_installer/python.py
@@ -2,6 +2,7 @@
 
 import os
 
+from . import package
 from . import utils
 
 
@@ -31,7 +32,7 @@ def setup_virtualenv(path, sudo_user=None):
     """Install a virtualenv if needed."""
     if os.path.exists(path):
         return
-    utils.install_system_package("python-virtualenv")
+    package.backend.install("python-virtualenv")
     with utils.settings(sudo_user=sudo_user):
         utils.exec_cmd("virtualenv {}".format(path))
         install_package("pip", venv=path, upgrade=True)
diff --git a/modoboa_installer/scripts/amavis.py b/modoboa_installer/scripts/amavis.py
index 6e60a84..272816a 100644
--- a/modoboa_installer/scripts/amavis.py
+++ b/modoboa_installer/scripts/amavis.py
@@ -1,7 +1,6 @@
 """Amavis related functions."""
 
-import re
-
+from .. import package
 from .. import utils
 
 from . import base
@@ -13,31 +12,50 @@ class Amavis(base.Installer):
     """Amavis installer."""
 
     appname = "amavis"
-    packages = ["libdbi-perl", "amavisd-new"]
+    packages = {
+        "deb": ["libdbi-perl", "amavisd-new"],
+        "rpm": ["amavisd-new"],
+    }
     with_db = True
-    config_files = ["05-node_id", "15-content_filter_mode", "50-user"]
+
+    @property
+    def config_dir(self):
+        """Return appropriate config dir."""
+        if package.backend.FORMAT == "rpm":
+            return "/etc/amavisd"
+        return "/etc/amavis"
+
+    def get_daemon_name(self):
+        """Return appropriate daemon name."""
+        if package.backend.FORMAT == "rpm":
+            return "amavisd"
+        return "amavis"
+
+    def get_config_files(self):
+        """Return appropriate config files."""
+        if package.backend.FORMAT == "deb":
+            return [
+                "conf.d/05-node_id", "conf.d/15-content_filter_mode",
+                "conf.d/50-user"]
+        return ["amavisd.conf"]
 
     def get_packages(self):
         """Additional packages."""
-        db_driver = "pg" if self.db_driver == "pgsql" else self.db_driver
-        return self.packages + ["libdbd-{}-perl".format(db_driver)]
-
-    @property
-    def installed_version(self):
-        """Check the installed version."""
-        name = "amavisd-new"
-        code, output = utils.exec_cmd(
-            """dpkg -s {} | grep Version""".format(name),
-            capture_output=True
-        )
-        match = re.match(r"Version: \d:(.+)-\d", output.decode())
-        if match:
-            return match.group(1)
-        return None
+        packages = super(Amavis, self).get_packages()
+        if package.backend.FORMAT == "deb":
+            db_driver = "pg" if self.db_driver == "pgsql" else self.db_driver
+            return packages + ["libdbd-{}-perl".format(db_driver)]
+        if self.db_driver == "pgsql":
+            db_driver = "Pg"
+        elif self.db_driver == "mysql":
+            db_driver = "MySQL"
+        else:
+            raise NotImplementedError("DB driver not supported")
+        return packages + ["perl-DBD-{}".format(db_driver)]
 
     def get_sql_schema_path(self):
         """Return schema path."""
-        version = self.installed_version
+        version = package.backend.get_installed_version("amavisd-new")
         if version is None:
             raise utils.FatalError("Amavis is not installed")
         return self.get_file_path(
diff --git a/modoboa_installer/scripts/base.py b/modoboa_installer/scripts/base.py
index 821cb57..74c2e04 100644
--- a/modoboa_installer/scripts/base.py
+++ b/modoboa_installer/scripts/base.py
@@ -3,6 +3,7 @@
 import os
 
 from .. import database
+from .. import package
 from .. import system
 from .. import utils
 
@@ -27,14 +28,21 @@ class Installer(object):
         self.db_driver = (
             "pgsql" if self.dbengine == "postgres" else self.dbengine)
         self.dbhost = self.config.get("database", "host")
-        if self.config.has_option(self.appname, "config_dir"):
-            self.config_dir = self.config.get(self.appname, "config_dir")
+        self._config_dir = None
         if not self.with_db:
             return
         self.dbname = self.config.get(self.appname, "dbname")
         self.dbuser = self.config.get(self.appname, "dbuser")
         self.dbpasswd = self.config.get(self.appname, "dbpassword")
 
+    @property
+    def config_dir(self):
+        """Return main configuration directory."""
+        if self._config_dir is None and self.config.has_option(
+                self.appname, "config_dir"):
+            self._config_dir = self.config.get(self.appname, "config_dir")
+        return self._config_dir
+
     def get_sql_schema_path(self):
         """Return a schema to install."""
         return None
@@ -90,14 +98,14 @@ class Installer(object):
 
     def get_packages(self):
         """Return the list of packages to install."""
-        return self.packages
+        return self.packages[package.backend.FORMAT]
 
     def install_packages(self):
         """Install required packages."""
         packages = self.get_packages()
         if not packages:
             return
-        utils.install_system_packages(packages)
+        package.backend.install_many(packages)
 
     def get_config_files(self):
         """Return the list of configuration files to copy."""
@@ -120,11 +128,16 @@ class Installer(object):
                 dst = os.path.join(self.config_dir, dst)
             utils.copy_from_template(src, dst, context)
 
+    def get_daemon_name(self):
+        """Return daemon name if defined."""
+        return self.daemon_name if self.daemon_name else self.appname
+
     def restart_daemon(self):
         """Restart daemon process."""
         if self.no_daemon:
             return
-        name = self.daemon_name if self.daemon_name else self.appname
+        name = self.get_daemon_name()
+        system.enable_service(name)
         code, output = utils.exec_cmd("service {} status".format(name))
         action = "start" if code else "restart"
         utils.exec_cmd("service {} {}".format(name, action))
diff --git a/modoboa_installer/scripts/clamav.py b/modoboa_installer/scripts/clamav.py
index 4628bae..60dab36 100644
--- a/modoboa_installer/scripts/clamav.py
+++ b/modoboa_installer/scripts/clamav.py
@@ -1,5 +1,6 @@
 """ClamAV related tools."""
 
+from .. import package
 from .. import utils
 from .. import system
 
@@ -11,24 +12,65 @@ class Clamav(base.Installer):
     """ClamAV installer."""
 
     appname = "clamav"
-    daemon_name = "clamav-daemon"
-    packages = ["clamav-daemon"]
+    packages = {
+        "deb": ["clamav-daemon"],
+        "rpm": [
+            "clamav", "clamav-update", "clamav-server", "clamav-server-systemd"
+        ],
+    }
+
+    def get_daemon_name(self):
+        """Return appropriate daemon name."""
+        if package.backend.FORMAT == "rpm":
+            return "clamd@amavisd"
+        return "clamav-daemon"
+
+    @property
+    def config_dir(self):
+        """Return appropriate config dir."""
+        if package.backend.FORMAT == "rpm":
+            return "/etc"
+        return ""
+
+    def get_config_files(self):
+        """Return appropriate config files."""
+        if package.backend.FORMAT == "rpm":
+            return ["sysconfig/clamd.amavisd", "tmpfiles.d/clamd.amavisd.conf"]
+        return []
 
     def post_run(self):
         """Additional tasks."""
-        user = self.config.get(self.appname, "user")
-        system.add_user_to_group(
-            user, self.config.get("amavis", "user")
-        )
-        pattern = (
-            "s/^AllowSupplementaryGroups false/"
-            "AllowSupplementaryGroups true/")
-        utils.exec_cmd(
-            "perl -pi -e '{}' /etc/clamav/clamd.conf".format(pattern))
-        if utils.dist_name == "ubuntu":
+        if package.backend.FORMAT == "deb":
+            user = self.config.get(self.appname, "user")
+            system.add_user_to_group(
+                user, self.config.get("amavis", "user")
+            )
+            pattern = (
+                "s/^AllowSupplementaryGroups false/"
+                "AllowSupplementaryGroups true/")
+            utils.exec_cmd(
+                "perl -pi -e '{}' /etc/clamav/clamd.conf".format(pattern))
+        else:
+            user = "clamupdate"
+            utils.exec_cmd(
+                "perl -pi -e 's/^Example/#Example/' /etc/freshclam.conf")
+            # Check if not present before
+            path = "/usr/lib/systemd/system/clamd@.service"
+            code, output = utils.exec_cmd(
+                "grep 'WantedBy=multi-user.target' {}".format(path))
+            if code:
+                utils.exec_cmd(
+                    """cat <<EOM >> {}
+
+[Install]
+WantedBy=multi-user.target
+EOM
+""".format(path))
+
+        if utils.dist_name() in ["debian", "ubuntu"]:
             # Stop freshclam daemon to allow manual download
             utils.exec_cmd("service clamav-freshclam stop")
-            utils.exec_cmd("freshclam", sudo_user=user)
+            utils.exec_cmd("freshclam", sudo_user=user, login=False)
             utils.exec_cmd("service clamav-freshclam start")
         else:
-            utils.exec_cmd("freshclam", sudo_user=user)
+            utils.exec_cmd("freshclam", sudo_user=user, login=False)
diff --git a/modoboa_installer/scripts/dovecot.py b/modoboa_installer/scripts/dovecot.py
index 671695e..f753b24 100644
--- a/modoboa_installer/scripts/dovecot.py
+++ b/modoboa_installer/scripts/dovecot.py
@@ -4,6 +4,7 @@ import glob
 import pwd
 
 from .. import database
+from .. import package
 from .. import utils
 
 from . import base
@@ -14,10 +15,13 @@ class Dovecot(base.Installer):
     """Dovecot installer."""
 
     appname = "dovecot"
-    packages = [
-        "dovecot-imapd", "dovecot-lmtpd", "dovecot-managesieved",
-        "dovecot-sieve"
-    ]
+    packages = {
+        "deb": [
+            "dovecot-imapd", "dovecot-lmtpd", "dovecot-managesieved",
+            "dovecot-sieve"],
+        "rpm": [
+            "dovecot", "dovecot-pigeonhole"]
+    }
     config_files = [
         "dovecot.conf", "dovecot-dict-sql.conf.ext", "conf.d/10-ssl.conf",
         "conf.d/20-lmtp.conf"]
@@ -33,21 +37,29 @@ class Dovecot(base.Installer):
     def get_packages(self):
         """Additional packages."""
         packages = ["dovecot-{}".format(self.db_driver)]
-        if "pop3" in self.config.get("dovecot", "extra_protocols"):
-            packages += ["dovecot-pop3d"]
-        return self.packages + packages
+        if package.backend.FORMAT == "deb":
+            if "pop3" in self.config.get("dovecot", "extra_protocols"):
+                packages += ["dovecot-pop3d"]
+        return super(Dovecot, self).get_packages() + packages
 
     def install_packages(self):
         """Preconfigure Dovecot if needed."""
-        if utils.dist_name() == "ubuntu":
-            utils.preconfigure_package(
-                "dovecot-core", "create-ssl-cert", "boolean", "false")
+        package.backend.preconfigure(
+            "dovecot-core", "create-ssl-cert", "boolean", "false")
         super(Dovecot, self).install_packages()
 
     def get_template_context(self):
         """Additional variables."""
         context = super(Dovecot, self).get_template_context()
         pw = pwd.getpwnam(self.user)
+        if "centos" in utils.dist_name():
+            protocols = "protocols = imap lmtp sieve"
+            extra_protocols = self.config.get("dovecot", "extra_protocols")
+            if extra_protocols:
+                protocols += " {}".format(extra_protocols)
+        else:
+            # Protocols are automatically guessed on debian/ubuntu
+            protocols = ""
         context.update({
             "db_driver": self.db_driver,
             "mailboxes_owner_uid": pw[2],
@@ -55,6 +67,7 @@ class Dovecot(base.Installer):
             "modoboa_dbname": self.config.get("modoboa", "dbname"),
             "modoboa_dbuser": self.config.get("modoboa", "dbuser"),
             "modoboa_dbpassword": self.config.get("modoboa", "dbpassword"),
+            "protocols": protocols
         })
         return context
 
diff --git a/modoboa_installer/scripts/files/amavis/amavisd.conf.tpl b/modoboa_installer/scripts/files/amavis/amavisd.conf.tpl
new file mode 100644
index 0000000..b29cac2
--- /dev/null
+++ b/modoboa_installer/scripts/files/amavis/amavisd.conf.tpl
@@ -0,0 +1,823 @@
+use strict;
+
+# a minimalistic configuration file for amavisd-new with all necessary settings
+#
+#   see amavisd.conf-default for a list of all variables with their defaults;
+#   for more details see documentation in INSTALL, README_FILES/*
+#   and at http://www.ijs.si/software/amavisd/amavisd-new-docs.html
+
+
+# COMMONLY ADJUSTED SETTINGS:
+
+# @bypass_virus_checks_maps = (1);  # controls running of anti-virus code
+# @bypass_spam_checks_maps  = (1);  # controls running of anti-spam code
+# $bypass_decode_parts = 1;         # controls running of decoders&dearchivers
+
+$max_servers = %max_servers; # num of pre-forked children (2..30 is common), -m
+$daemon_user  = 'amavis';    # (no default;  customary: vscan or amavis), -u
+$daemon_group = 'amavis';    # (no default;  customary: vscan or amavis), -g
+
+$mydomain = '%hostname';   # a convenient default for other settings
+
+$MYHOME = '/var/spool/amavisd';   # a convenient default for other settings, -H
+$TEMPBASE = "$MYHOME/tmp";   # working directory, needs to exist, -T
+$ENV{TMPDIR} = $TEMPBASE;    # environment variable TMPDIR, used by SA, etc.
+$QUARANTINEDIR = undef;      # -Q
+# $quarantine_subdir_levels = 1;  # add level of subdirs to disperse quarantine
+# $release_format = 'resend';     # 'attach', 'plain', 'resend'
+# $report_format  = 'arf';        # 'attach', 'plain', 'resend', 'arf'
+
+# $daemon_chroot_dir = $MYHOME;   # chroot directory or undef, -R
+
+$db_home   = "$MYHOME/db";        # dir for bdb nanny/cache/snmp databases, -D
+# $helpers_home = "$MYHOME/var";  # working directory for SpamAssassin, -S
+$lock_file = "/var/run/amavisd/amavisd.lock";  # -L
+$pid_file  = "/var/run/amavisd/amavisd.pid";   # -P
+#NOTE: create directories $MYHOME/tmp, $MYHOME/var, $MYHOME/db manually
+
+$log_level = 0;              # verbosity 0..5, -d
+$log_recip_templ = undef;    # disable by-recipient level-0 log entries
+$do_syslog = 1;              # log via syslogd (preferred)
+$syslog_facility = 'mail';   # Syslog facility as a string
+           # e.g.: mail, daemon, user, local0, ... local7
+
+$enable_db = 1;              # enable use of BerkeleyDB/libdb (SNMP and nanny)
+# $enable_zmq = 1;           # enable use of ZeroMQ (SNMP and nanny)
+$nanny_details_level = 2;    # nanny verbosity: 1: traditional, 2: detailed
+$enable_dkim_verification = 1;  # enable DKIM signatures verification
+$enable_dkim_signing = 1;    # load DKIM signing code, keys defined by dkim_key
+
+@local_domains_maps = ( [".$mydomain"] );  # list of all local domains
+
+@mynetworks = qw( 127.0.0.0/8 [::1] [FE80::]/10 [FEC0::]/10
+                  10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 );
+
+$unix_socketname = "/var/run/amavisd/amavisd.sock";  # amavisd-release or amavis-milter
+               # option(s) -p overrides $inet_socket_port and $unix_socketname
+
+# $inet_socket_port = 10024;   # listen on this local TCP port(s)
+$inet_socket_port = [9998, 10024, 10026];  # listen on multiple TCP ports
+
+$policy_bank{'MYNETS'} = {   # mail originating from @mynetworks
+  originating => 1,  # is true in MYNETS by default, but let's make it explicit
+  os_fingerprint_method => undef,  # don't query p0f for internal clients
+};
+
+# it is up to MTA to re-route mail from authenticated roaming users or
+# from internal hosts to a dedicated TCP port (such as 10026) for filtering
+$interface_policy{'10026'} = 'ORIGINATING';
+
+$policy_bank{'ORIGINATING'} = {  # mail supposedly originating from our users
+  originating => 1,  # declare that mail was submitted by our smtp client
+  allow_disclaimers => 1,  # enables disclaimer insertion if available
+  # notify administrator of locally originating malware
+  virus_admin_maps => ["virusalert\@$mydomain"],
+  spam_admin_maps  => ["virusalert\@$mydomain"],
+  warnbadhsender   => 1,
+  # forward to a smtpd service providing DKIM signing service
+  # forward_method => 'smtp:[127.0.0.1]:10027',
+  # force MTA conversion to 7-bit (e.g. before DKIM signing)
+  smtpd_discard_ehlo_keywords => ['8BITMIME'],
+  bypass_banned_checks_maps => [1],  # allow sending any file names and types
+  terminate_dsn_on_notify_success => 0,  # don't remove NOTIFY=SUCCESS option
+};
+
+$interface_policy{'9998'} = 'AM.PDP-INET'; # only applies with $unix_socketname
+
+# Use with amavis-release over a socket or with Petr Rehor's amavis-milter.c
+# (with amavis-milter.c from this package or old amavis.c client use 'AM.CL'):
+$policy_bank{'AM.PDP-INET'} = {
+  protocol => 'AM.PDP',
+  inet_acl => [qw( 127.0.0.1 )],
+};
+
+$sa_tag_level_deflt  = 2.0;  # add spam info headers if at, or above that level
+$sa_tag2_level_deflt = 6.2;  # add 'spam detected' headers at that level
+$sa_kill_level_deflt = 6.9;  # triggers spam evasive actions (e.g. blocks mail)
+$sa_dsn_cutoff_level = 10;   # spam level beyond which a DSN is not sent
+$sa_crediblefrom_dsn_cutoff_level = 18; # likewise, but for a likely valid From
+# $sa_quarantine_cutoff_level = 25; # spam level beyond which quarantine is off
+$penpals_bonus_score = 8;    # (no effect without a @storage_sql_dsn database)
+$penpals_threshold_high = $sa_kill_level_deflt;  # don't waste time on hi spam
+$bounce_killer_score = 100;  # spam score points to add for joe-jobbed bounces
+
+$sa_mail_body_size_limit = 400*1024; # don't waste time on SA if mail is larger
+$sa_local_tests_only = 0;    # only tests which do not require internet access?
+
+# @lookup_sql_dsn =
+#   ( ['DBI:mysql:database=mail;host=127.0.0.1;port=3306', 'user1', 'passwd1'],
+#     ['DBI:mysql:database=mail;host=host2', 'username2', 'password2'],
+#     ["DBI:SQLite:dbname=$MYHOME/sql/mail_prefs.sqlite", '', ''] );
+# @storage_sql_dsn = @lookup_sql_dsn;  # none, same, or separate database
+# @storage_redis_dsn = ( {server=>'127.0.0.1:6379', db_id=>1} );
+# $redis_logging_key = 'amavis-log';
+# $redis_logging_queue_size_limit = 300000;  # about 250 MB / 100000
+@lookup_sql_dsn = ( [ 'DBI:%dbengine:database=%dbname;host=%dbhost', '%dbuser', '%dbpassword' ]);
+@storage_sql_dsn = @lookup_sql_dsn;
+$sql_allow_8bit_address = 1;
+
+# $timestamp_fmt_mysql = 1; # if using MySQL *and* msgs.time_iso is TIMESTAMP;
+#   defaults to 0, which is good for non-MySQL or if msgs.time_iso is CHAR(16)
+
+$virus_admin               = undef;                    # notifications recip.
+
+$mailfrom_notify_admin     = undef;                    # notifications sender
+$mailfrom_notify_recip     = undef;                    # notifications sender
+$mailfrom_notify_spamadmin = undef;                    # notifications sender
+$mailfrom_to_quarantine = ''; # null return path; uses original sender if undef
+
+@addr_extension_virus_maps      = ('virus');
+@addr_extension_banned_maps     = ('banned');
+@addr_extension_spam_maps       = ('spam');
+@addr_extension_bad_header_maps = ('badh');
+# $recipient_delimiter = '+';  # undef disables address extensions altogether
+# when enabling addr extensions do also Postfix/main.cf: recipient_delimiter=+
+
+$path = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/usr/bin:/bin';
+# $dspam = 'dspam';
+
+$MAXLEVELS = 14;
+$MAXFILES = 3000;
+$MIN_EXPANSION_QUOTA =      100*1024;  # bytes  (default undef, not enforced)
+$MAX_EXPANSION_QUOTA = 500*1024*1024;  # bytes  (default undef, not enforced)
+
+$sa_spam_subject_tag = '***Spam*** ';
+$defang_virus  = 1;  # MIME-wrap passed infected mail
+$defang_banned = 1;  # MIME-wrap passed mail containing banned name
+# for defanging bad headers only turn on certain minor contents categories:
+$defang_by_ccat{CC_BADH.",3"} = 1;  # NUL or CR character in header
+$defang_by_ccat{CC_BADH.",5"} = 1;  # header line longer than 998 characters
+$defang_by_ccat{CC_BADH.",6"} = 1;  # header field syntax error
+
+
+# OTHER MORE COMMON SETTINGS (defaults may suffice):
+
+# $myhostname = 'host.example.com';  # must be a fully-qualified domain name!
+
+# $notify_method  = 'smtp:[127.0.0.1]:10025';
+# $forward_method = 'smtp:[127.0.0.1]:10025';  # set to undef with milter!
+
+$final_virus_destiny      = D_DISCARD;
+$final_banned_destiny     = D_BOUNCE;
+$final_spam_destiny       = D_DISCARD;  #!!!  D_DISCARD / D_REJECT
+$final_bad_header_destiny = D_BOUNCE;
+
+$virus_quarantine_method = 'sql:';
+$spam_quarantine_method = 'sql:';
+$banned_files_quarantine_method = 'sql:';
+$bad_header_quarantine_method = 'sql:';
+
+# $os_fingerprint_method = 'p0f:*:2345';  # to query p0f-analyzer.pl
+
+## hierarchy by which a final setting is chosen:
+##   policy bank (based on port or IP address) -> *_by_ccat
+##   *_by_ccat (based on mail contents) -> *_maps
+##   *_maps (based on recipient address) -> final configuration value
+
+
+# SOME OTHER VARIABLES WORTH CONSIDERING (see amavisd.conf-default for all)
+
+# $warnbadhsender,
+# $warnvirusrecip, $warnbannedrecip, $warnbadhrecip, (or @warn*recip_maps)
+#
+# @bypass_virus_checks_maps, @bypass_spam_checks_maps,
+# @bypass_banned_checks_maps, @bypass_header_checks_maps,
+#
+# @virus_lovers_maps, @spam_lovers_maps,
+# @banned_files_lovers_maps, @bad_header_lovers_maps,
+#
+# @blacklist_sender_maps, @score_sender_maps,
+#
+# $clean_quarantine_method, $virus_quarantine_to, $banned_quarantine_to,
+# $bad_header_quarantine_to, $spam_quarantine_to,
+#
+# $defang_bad_header, $defang_undecipherable, $defang_spam
+
+
+# REMAINING IMPORTANT VARIABLES ARE LISTED HERE BECAUSE OF LONGER ASSIGNMENTS
+
+@keep_decoded_original_maps = (new_RE(
+  qr'^MAIL$',                # let virus scanner see full original message
+  qr'^MAIL-UNDECIPHERABLE$', # same as ^MAIL$ if mail is undecipherable
+  qr'^(ASCII(?! cpio)|text|uuencoded|xxencoded|binhex)'i,
+# qr'^Zip archive data',     # don't trust Archive::Zip
+));
+
+
+$banned_filename_re = new_RE(
+
+### BLOCKED ANYWHERE
+# qr'^UNDECIPHERABLE$',  # is or contains any undecipherable components
+  qr'^\.(exe-ms|dll)$',                   # banned file(1) types, rudimentary
+# qr'^\.(exe|lha|cab|dll)$',              # banned file(1) types
+
+### BLOCK THE FOLLOWING, EXCEPT WITHIN UNIX ARCHIVES:
+# [ qr'^\.(gz|bz2)$'             => 0 ],  # allow any in gzip or bzip2
+  [ qr'^\.(rpm|cpio|tar)$'       => 0 ],  # allow any in Unix-type archives
+
+  qr'.\.(pif|scr)$'i,                     # banned extensions - rudimentary
+# qr'^\.zip$',                            # block zip type
+
+### BLOCK THE FOLLOWING, EXCEPT WITHIN ARCHIVES:
+# [ qr'^\.(zip|rar|arc|arj|zoo)$'=> 0 ],  # allow any within these archives
+
+  qr'^application/x-msdownload$'i,        # block these MIME types
+  qr'^application/x-msdos-program$'i,
+  qr'^application/hta$'i,
+
+# qr'^message/partial$'i,         # rfc2046 MIME type
+# qr'^message/external-body$'i,   # rfc2046 MIME type
+
+# qr'^(application/x-msmetafile|image/x-wmf)$'i,  # Windows Metafile MIME type
+# qr'^\.wmf$',                            # Windows Metafile file(1) type
+
+  # block certain double extensions in filenames
+  qr'^(?!cid:).*\.[^./]*[A-Za-z][^./]*\.\s*(exe|vbs|pif|scr|bat|cmd|com|cpl|dll)[.\s]*$'i,
+
+# qr'\{[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}\}?'i, # Class ID CLSID, strict
+# qr'\{[0-9a-z]{4,}(-[0-9a-z]{4,}){0,7}\}?'i, # Class ID extension CLSID, loose
+
+  qr'.\.(exe|vbs|pif|scr|cpl)$'i,             # banned extension - basic
+# qr'.\.(exe|vbs|pif|scr|cpl|bat|cmd|com)$'i, # banned extension - basic+cmd
+# qr'.\.(ade|adp|app|bas|bat|chm|cmd|com|cpl|crt|emf|exe|fxp|grp|hlp|hta|
+#        inf|ini|ins|isp|js|jse|lib|lnk|mda|mdb|mde|mdt|mdw|mdz|msc|msi|
+#        msp|mst|ocx|ops|pcd|pif|prg|reg|scr|sct|shb|shs|sys|vb|vbe|vbs|vxd|
+#        wmf|wsc|wsf|wsh)$'ix,                # banned extensions - long
+# qr'.\.(asd|asf|asx|url|vcs|wmd|wmz)$'i,     # consider also
+# qr'.\.(ani|cur|ico)$'i,                 # banned cursors and icons filename
+# qr'^\.ani$',                            # banned animated cursor file(1) type
+# qr'.\.(mim|b64|bhx|hqx|xxe|uu|uue)$'i,  # banned extension - WinZip vulnerab.
+);
+# See http://support.microsoft.com/default.aspx?scid=kb;EN-US;q262631
+# and http://www.cknow.com/vtutor/vtextensions.htm
+
+
+# ENVELOPE SENDER SOFT-WHITELISTING / SOFT-BLACKLISTING
+
+@score_sender_maps = ({ # a by-recipient hash lookup table,
+                        # results from all matching recipient tables are summed
+
+# ## per-recipient personal tables  (NOTE: positive: black, negative: white)
+# 'user1@example.com'  => [{'bla-mobile.press@example.com' => 10.0}],
+# 'user3@example.com'  => [{'.ebay.com'                 => -3.0}],
+# 'user4@example.com'  => [{'cleargreen@cleargreen.com' => -7.0,
+#                           '.cleargreen.com'           => -5.0}],
+
+  ## site-wide opinions about senders (the '.' matches any recipient)
+  '.' => [  # the _first_ matching sender determines the score boost
+
+   new_RE(  # regexp-type lookup table, just happens to be all soft-blacklist
+    [qr'^(bulkmail|offers|cheapbenefits|earnmoney|foryou)@'i         => 5.0],
+    [qr'^(greatcasino|investments|lose_weight_today|market\.alert)@'i=> 5.0],
+    [qr'^(money2you|MyGreenCard|new\.tld\.registry|opt-out|opt-in)@'i=> 5.0],
+    [qr'^(optin|saveonlsmoking2002k|specialoffer|specialoffers)@'i   => 5.0],
+    [qr'^(stockalert|stopsnoring|wantsome|workathome|yesitsfree)@'i  => 5.0],
+    [qr'^(your_friend|greatoffers)@'i                                => 5.0],
+    [qr'^(inkjetplanet|marketopt|MakeMoney)\d*@'i                    => 5.0],
+   ),
+
+#  read_hash("/var/amavis/sender_scores_sitewide"),
+
+   { # a hash-type lookup table (associative array)
+     'nobody@cert.org'                        => -3.0,
+     'cert-advisory@us-cert.gov'              => -3.0,
+     'owner-alert@iss.net'                    => -3.0,
+     'slashdot@slashdot.org'                  => -3.0,
+     'securityfocus.com'                      => -3.0,
+     'ntbugtraq@listserv.ntbugtraq.com'       => -3.0,
+     'security-alerts@linuxsecurity.com'      => -3.0,
+     'mailman-announce-admin@python.org'      => -3.0,
+     'amavis-user-admin@lists.sourceforge.net'=> -3.0,
+     'amavis-user-bounces@lists.sourceforge.net' => -3.0,
+     'spamassassin.apache.org'                => -3.0,
+     'notification-return@lists.sophos.com'   => -3.0,
+     'owner-postfix-users@postfix.org'        => -3.0,
+     'owner-postfix-announce@postfix.org'     => -3.0,
+     'owner-sendmail-announce@lists.sendmail.org'   => -3.0,
+     'sendmail-announce-request@lists.sendmail.org' => -3.0,
+     'donotreply@sendmail.org'                => -3.0,
+     'ca+envelope@sendmail.org'               => -3.0,
+     'noreply@freshmeat.net'                  => -3.0,
+     'owner-technews@postel.acm.org'          => -3.0,
+     'ietf-123-owner@loki.ietf.org'           => -3.0,
+     'cvs-commits-list-admin@gnome.org'       => -3.0,
+     'rt-users-admin@lists.fsck.com'          => -3.0,
+     'clp-request@comp.nus.edu.sg'            => -3.0,
+     'surveys-errors@lists.nua.ie'            => -3.0,
+     'emailnews@genomeweb.com'                => -5.0,
+     'yahoo-dev-null@yahoo-inc.com'           => -3.0,
+     'returns.groups.yahoo.com'               => -3.0,
+     'clusternews@linuxnetworx.com'           => -3.0,
+     lc('lvs-users-admin@LinuxVirtualServer.org')    => -3.0,
+     lc('owner-textbreakingnews@CNNIMAIL12.CNN.COM') => -5.0,
+
+     # soft-blacklisting (positive score)
+     'sender@example.net'                     =>  3.0,
+     '.example.net'                           =>  1.0,
+
+   },
+  ],  # end of site-wide tables
+});
+
+
+@decoders = (
+  ['mail', \&do_mime_decode],
+# [[qw(asc uue hqx ync)], \&do_ascii],  # not safe
+  ['F',    \&do_uncompress, ['unfreeze', 'freeze -d', 'melt', 'fcat'] ],
+  ['Z',    \&do_uncompress, ['uncompress', 'gzip -d', 'zcat'] ],
+  ['gz',   \&do_uncompress, 'gzip -d'],
+  ['gz',   \&do_gunzip],
+  ['bz2',  \&do_uncompress, 'bzip2 -d'],
+  ['xz',   \&do_uncompress,
+           ['xzdec', 'xz -dc', 'unxz -c', 'xzcat'] ],
+  ['lzma', \&do_uncompress,
+           ['lzmadec', 'xz -dc --format=lzma',
+            'lzma -dc', 'unlzma -c', 'lzcat', 'lzmadec'] ],
+  ['lrz',  \&do_uncompress,
+           ['lrzip -q -k -d -o -', 'lrzcat -q -k'] ],
+  ['lzo',  \&do_uncompress, 'lzop -d'],
+  ['lz4',  \&do_uncompress, ['lz4c -d'] ],
+  ['rpm',  \&do_uncompress, ['rpm2cpio.pl', 'rpm2cpio'] ],
+  [['cpio','tar'], \&do_pax_cpio, ['pax', 'gcpio', 'cpio'] ],
+           # ['/usr/local/heirloom/usr/5bin/pax', 'pax', 'gcpio', 'cpio']
+  ['deb',  \&do_ar, 'ar'],
+# ['a',    \&do_ar, 'ar'],  # unpacking .a seems an overkill
+  ['rar',  \&do_unrar, ['unrar', 'rar'] ],
+  ['arj',  \&do_unarj, ['unarj', 'arj'] ],
+  ['arc',  \&do_arc,   ['nomarch', 'arc'] ],
+  ['zoo',  \&do_zoo,   ['zoo', 'unzoo'] ],
+# ['doc',  \&do_ole,   'ripole'],  # no ripole package so far
+  ['cab',  \&do_cabextract, 'cabextract'],
+# ['tnef', \&do_tnef_ext, 'tnef'],  # use internal do_tnef() instead
+  ['tnef', \&do_tnef],
+# ['lha',  \&do_lha,   'lha'],  # not safe, use 7z instead
+# ['sit',  \&do_unstuff, 'unstuff'],  # not safe
+  [['zip','kmz'], \&do_7zip,  ['7za', '7z'] ],
+  [['zip','kmz'], \&do_unzip],
+  ['7z',   \&do_7zip,  ['7zr', '7za', '7z'] ],
+  [[qw(gz bz2 Z tar)],
+           \&do_7zip,  ['7za', '7z'] ],
+  [[qw(xz lzma jar cpio arj rar swf lha iso cab deb rpm)],
+           \&do_7zip,  '7z' ],
+  ['exe',  \&do_executable, ['unrar','rar'], 'lha', ['unarj','arj'] ],
+);
+
+
+@av_scanners = (
+
+# ### http://www.sophos.com/
+# ['Sophos-SSSP',  # SAV Dynamic Interface
+#   \&ask_daemon, ["{}", 'sssp:/var/run/savdi/sssp.sock'],
+#           # or: ["{}", 'sssp:[127.0.0.1]:4010'],
+#   qr/^DONE OK\b/m, qr/^VIRUS\b/m, qr/^VIRUS\s*(\S*)/m ],
+
+# ### http://www.clanfield.info/sophie/ (http://www.vanja.com/tools/sophie/)
+# ['Sophie',
+#   \&ask_daemon, ["{}/\n", 'sophie:/var/run/sophie'],
+#   qr/(?x)^ 0+ ( : | [\000\r\n]* $)/,  qr/(?x)^ 1 ( : | [\000\r\n]* $)/,
+#   qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
+
+# ### http://www.csupomona.edu/~henson/www/projects/SAVI-Perl/
+# ['Sophos SAVI', \&ask_daemon, ['{}','savi-perl:'] ],
+
+# ['Avira SAVAPI',
+#   \&ask_daemon, ["*", 'savapi:/var/tmp/.savapi3', 'product-id'],
+#   qr/^(200|210)/m,  qr/^(310|420|319)/m,
+#   qr/^(?:310|420)[,\s]*(?:.* <<< )?(.+?)(?: ; |$)/m ],
+# settings for the SAVAPI3.conf: ArchiveScan=1, HeurLevel=2, MailboxScan=1
+
+  ### http://www.clamav.net/
+  ['ClamAV-clamd',
+    \&ask_daemon, ["CONTSCAN {}\n", "/var/run/clamd.amavisd/clamd.sock"],
+    qr/\bOK$/m, qr/\bFOUND$/m,
+    qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
+  # NOTE: run clamd under the same user as amavisd - or run it under its own
+  #   uid such as clamav, add user clamav to the amavis group, and then add
+  #   AllowSupplementaryGroups to clamd.conf;
+  # NOTE: match socket name (LocalSocket) in clamav.conf to the socket name in
+  #   this entry; when running chrooted one may prefer a socket under $MYHOME.
+
+# ### http://www.clamav.net/ and CPAN  (memory-hungry! clamd is preferred)
+# # note that Mail::ClamAV requires perl to be build with threading!
+# ['Mail::ClamAV', \&ask_daemon, ['{}','clamav-perl:'],
+#   [0], [1], qr/^INFECTED: (.+)/m],
+
+# ### http://www.openantivirus.org/
+# ['OpenAntiVirus ScannerDaemon (OAV)',
+#   \&ask_daemon, ["SCAN {}\n", '127.0.0.1:8127'],
+#   qr/^OK/m, qr/^FOUND: /m, qr/^FOUND: (.+)/m ],
+
+# ### http://www.vanja.com/tools/trophie/
+# ['Trophie',
+#   \&ask_daemon, ["{}/\n", 'trophie:/var/run/trophie'],
+#   qr/(?x)^ 0+ ( : | [\000\r\n]* $)/m,  qr/(?x)^ 1 ( : | [\000\r\n]* $)/m,
+#   qr/(?x)^ [-+]? \d+ : (.*?) [\000\r\n]* $/m ],
+
+# ### http://www.grisoft.com/
+# ['AVG Anti-Virus',
+#   \&ask_daemon, ["SCAN {}\n", '127.0.0.1:55555'],
+#   qr/^200/m, qr/^403/m, qr/^403[- ].*: ([^\r\n]+)/m ],
+
+# ### http://www.f-prot.com/
+# ['F-Prot fpscand',  # F-PROT Antivirus for BSD/Linux/Solaris, version 6
+#   \&ask_daemon,
+#   ["SCAN FILE {}/*\n", '127.0.0.1:10200'],
+#   qr/^(0|8|64) /m,
+#   qr/^([1235679]|1[01345]) |<[^>:]*(?i)(infected|suspicious|unwanted)/m,
+#   qr/(?i)<[^>:]*(?:infected|suspicious|unwanted)[^>:]*: ([^>]*)>/m ],
+
+# ### http://www.f-prot.com/
+# ['F-Prot f-protd',  # old version
+#   \&ask_daemon,
+#   ["GET {}/*?-dumb%%20-archive%%20-packed HTTP/1.0\r\n\r\n",
+#     ['127.0.0.1:10200', '127.0.0.1:10201', '127.0.0.1:10202',
+#      '127.0.0.1:10203', '127.0.0.1:10204'] ],
+#   qr/(?i)<summary[^>]*>clean<\/summary>/m,
+#   qr/(?i)<summary[^>]*>infected<\/summary>/m,
+#   qr/(?i)<name>(.+)<\/name>/m ],
+
+# ### http://www.sald.com/, http://www.dials.ru/english/, http://www.drweb.ru/
+# ['DrWebD', \&ask_daemon,   # DrWebD 4.31 or later
+#   [pack('N',1).  # DRWEBD_SCAN_CMD
+#    pack('N',0x00280001).   # DONT_CHANGEMAIL, IS_MAIL, RETURN_VIRUSES
+#    pack('N',     # path length
+#      length("$TEMPBASE/amavis-yyyymmddTHHMMSS-xxxxx/parts/pxxx")).
+#    '{}/*'.       # path
+#    pack('N',0).  # content size
+#    pack('N',0),
+#    '/var/drweb/run/drwebd.sock',
+#  # '/var/amavis/var/run/drwebd.sock',   # suitable for chroot
+#  # '/usr/local/drweb/run/drwebd.sock',  # FreeBSD drweb ports default
+#  # '127.0.0.1:3000',                    # or over an inet socket
+#   ],
+#   qr/\A\x00[\x10\x11][\x00\x10]\x00/sm,        # IS_CLEAN,EVAL_KEY; SKIPPED
+#   qr/\A\x00[\x00\x01][\x00\x10][\x20\x40\x80]/sm,# KNOWN_V,UNKNOWN_V,V._MODIF
+#   qr/\A.{12}(?:infected with )?([^\x00]+)\x00/sm,
+# ],
+# # NOTE: If using amavis-milter, change length to:
+# # length("$TEMPBASE/amavis-milter-xxxxxxxxxxxxxx/parts/pxxx").
+
+  ### http://www.kaspersky.com/  (kav4mailservers)
+  ['KasperskyLab AVP - aveclient',
+    ['/usr/local/kav/bin/aveclient','/usr/local/share/kav/bin/aveclient',
+     '/opt/kav/5.5/kav4mailservers/bin/aveclient','aveclient'],
+    '-p /var/run/aveserver -s {}/*',
+    [0,3,6,8], qr/\b(INFECTED|SUSPICION|SUSPICIOUS)\b/m,
+    qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.+)/m,
+  ],
+  # NOTE: one may prefer [0],[2,3,4,5], depending on how suspicious,
+  # currupted or protected archives are to be handled
+
+  ### http://www.kaspersky.com/
+  ['KasperskyLab AntiViral Toolkit Pro (AVP)', ['avp'],
+    '-* -P -B -Y -O- {}', [0,3,6,8], [2,4],    # any use for -A -K   ?
+    qr/infected: (.+)/m,
+    sub {chdir('/opt/AVP') or die "Can't chdir to AVP: $!"},
+    sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
+  ],
+
+  ### The kavdaemon and AVPDaemonClient have been removed from Kasperky
+  ### products and replaced by aveserver and aveclient
+  ['KasperskyLab AVPDaemonClient',
+    [ '/opt/AVP/kavdaemon',       'kavdaemon',
+      '/opt/AVP/AvpDaemonClient', 'AvpDaemonClient',
+      '/opt/AVP/AvpTeamDream',    'AvpTeamDream',
+      '/opt/AVP/avpdc', 'avpdc' ],
+    "-f=$TEMPBASE {}", [0,8], [3,4,5,6], qr/infected: ([^\r\n]+)/m ],
+    # change the startup-script in /etc/init.d/kavd to:
+    #   DPARMS="-* -Y -dl -f=/var/amavis /var/amavis"
+    #   (or perhaps:   DPARMS="-I0 -Y -* /var/amavis" )
+    # adjusting /var/amavis above to match your $TEMPBASE.
+    # The '-f=/var/amavis' is needed if not running it as root, so it
+    # can find, read, and write its pid file, etc., see 'man kavdaemon'.
+    # defUnix.prf: there must be an entry "*/var/amavis" (or whatever
+    #   directory $TEMPBASE specifies) in the 'Names=' section.
+    # cd /opt/AVP/DaemonClients; configure; cd Sample; make
+    # cp AvpDaemonClient /opt/AVP/
+    # su - vscan -c "${PREFIX}/kavdaemon ${DPARMS}"
+
+  ### http://www.centralcommand.com/
+  ['CentralCommand Vexira (new) vascan',
+    ['vascan','/usr/lib/Vexira/vascan'],
+    "-a s --timeout=60 --temp=$TEMPBASE -y $QUARANTINEDIR ".
+    "--log=/var/log/vascan.log {}",
+    [0,3], [1,2,5],
+    qr/(?x)^\s* (?:virus|iworm|macro|mutant|sequence|trojan)\ found:\ ( [^\]\s']+ )\ \.\.\.\ /m ],
+    # Adjust the path of the binary and the virus database as needed.
+    # 'vascan' does not allow to have the temp directory to be the same as
+    # the quarantine directory, and the quarantine option can not be disabled.
+    # If $QUARANTINEDIR is not used, then another directory must be specified
+    # to appease 'vascan'. Move status 3 to the second list if password
+    # protected files are to be considered infected.
+
+  ### http://www.avira.com/
+  ### old Avira AntiVir 2.x (ex H+BEDV) or old CentralCommand Vexira Antivirus
+  ['Avira AntiVir', ['antivir','vexira'],
+    '--allfiles -noboot -nombr -rs -s -z {}', [0], qr/ALERT:|VIRUS:/m,
+    qr/(?x)^\s* (?: ALERT: \s* (?: \[ | [^']* ' ) |
+         (?i) VIRUS:\ .*?\ virus\ '?) ( [^\]\s']+ )/m ],
+    # NOTE: if you only have a demo version, remove -z and add 214, as in:
+    #  '--allfiles -noboot -nombr -rs -s {}', [0,214], qr/ALERT:|VIRUS:/,
+
+  ### http://www.avira.com/
+  ### Avira for UNIX 3.x
+  ['Avira AntiVir', ['avscan'],
+   '-s --batch --alert-action=none {}', [0,4], qr/(?:ALERT|FUND):/m,
+   qr/(?:ALERT|FUND): (?:.* <<< )?(.+?)(?: ; |$)/m ],
+
+  ### http://www.commandsoftware.com/
+  ['Command AntiVirus for Linux', 'csav',
+    '-all -archive -packed {}', [50], [51,52,53],
+    qr/Infection: (.+)/m ],
+
+  ### http://www.symantec.com/
+  ['Symantec CarrierScan via Symantec CommandLineScanner',
+    'cscmdline', '-a scan -i 1 -v -s 127.0.0.1:7777 {}',
+    qr/^Files Infected:\s+0$/m, qr/^Infected\b/m,
+    qr/^(?:Info|Virus Name):\s+(.+)/m ],
+
+  ### http://www.symantec.com/
+  ['Symantec AntiVirus Scan Engine',
+    'savsecls', '-server 127.0.0.1:7777 -mode scanrepair -details -verbose {}',
+    [0], qr/^Infected\b/m,
+    qr/^(?:Info|Virus Name):\s+(.+)/m ],
+    # NOTE: check options and patterns to see which entry better applies
+
+# ### http://www.f-secure.com/products/anti-virus/  version 5.52
+#  ['F-Secure Antivirus for Linux servers',
+#   ['/opt/f-secure/fsav/bin/fsav', 'fsav'],
+#   '--virus-action1=report --archive=yes --auto=yes '.
+#   '--dumb=yes --list=no --mime=yes {}', [0], [3,4,6,8],
+#   qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
+#   # NOTE: internal archive handling may be switched off by '--archive=no'
+#   #   to prevent fsav from exiting with status 9 on broken archives
+
+  ### http://www.f-secure.com/ version 9.14
+   ['F-Secure Linux Security',
+    ['/opt/f-secure/fsav/bin/fsav', 'fsav'],
+    '--virus-action1=report --archive=yes --auto=yes '.
+    '--list=no --nomimeerr {}', [0], [3,4,6,8],
+    qr/(?:infection|Infected|Suspected|Riskware): (.+)/m ],
+    # NOTE: internal archive handling may be switched off by '--archive=no'
+    #   to prevent fsav from exiting with status 9 on broken archives
+
+# ### http://www.avast.com/
+# ['avast! Antivirus daemon',
+#   \&ask_daemon,  # greets with 220, terminate with QUIT
+#   ["SCAN {}\015\012QUIT\015\012", '/var/run/avast4/mailscanner.sock'],
+#   qr/\t\[\+\]/m, qr/\t\[L\]\t/m, qr/\t\[L\]\t[0-9]+\s+([^[ \t\015\012]+)/m ],
+
+# ### http://www.avast.com/
+# ['avast! Antivirus - Client/Server Version', 'avastlite',
+#   '-a /var/run/avast4/mailscanner.sock -n {}', [0], [1],
+#   qr/\t\[L\]\t([^[ \t\015\012]+)/m ],
+
+  ['CAI InoculateIT', 'inocucmd',  # retired product
+    '-sec -nex {}', [0], [100],
+    qr/was infected by virus (.+)/m ],
+  # see: http://www.flatmtn.com/computer/Linux-Antivirus_CAI.html
+
+  ### http://www3.ca.com/Solutions/Product.asp?ID=156  (ex InoculateIT)
+  ['CAI eTrust Antivirus', 'etrust-wrapper',
+    '-arc -nex -spm h {}', [0], [101],
+    qr/is infected by virus: (.+)/m ],
+    # NOTE: requires suid wrapper around inocmd32; consider flag: -mod reviewer
+    # see http://marc.theaimsgroup.com/?l=amavis-user&m=109229779912783
+
+  ### http://mks.com.pl/english.html
+  ['MkS_Vir for Linux (beta)', ['mks32','mks'],
+    '-s {}/*', [0], [1,2],
+    qr/--[ \t]*(.+)/m ],
+
+  ### http://mks.com.pl/english.html
+  ['MkS_Vir daemon', 'mksscan',
+    '-s -q {}', [0], [1..7],
+    qr/^... (\S+)/m ],
+
+# ### http://www.nod32.com/,  version v2.52 (old)
+# ['ESET NOD32 for Linux Mail servers',
+#   ['/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
+#    '--subdir --files -z --sfx --rtp --adware --unsafe --pattern --heur '.
+#    '-w -a --action-on-infected=accept --action-on-uncleanable=accept '.
+#    '--action-on-notscanned=accept {}',
+#   [0,3], [1,2], qr/virus="([^"]+)"/m ],
+
+# ### http://www.eset.com/, version v2.7 (old)
+# ['ESET NOD32 Linux Mail Server - command line interface',
+#   ['/usr/bin/nod32cli', '/opt/eset/nod32/bin/nod32cli', 'nod32cli'],
+#   '--subdir {}', [0,3], [1,2], qr/virus="([^"]+)"/m ],
+
+# ### http://www.eset.com/, version 2.71.12
+# ['ESET Software ESETS Command Line Interface',
+#   ['/usr/bin/esets_cli', 'esets_cli'],
+#   '--subdir {}', [0], [1,2,3], qr/virus="([^"]+)"/m ],
+
+  ### http://www.eset.com/, version 3.0
+  ['ESET Software ESETS Command Line Interface',
+    ['/usr/bin/esets_cli', 'esets_cli'],
+    '--subdir {}', [0], [1,2,3],
+    qr/:\s*action="(?!accepted)[^"]*"\n.*:\s*virus="([^"]*)"/m ],
+
+  ## http://www.nod32.com/,  NOD32LFS version 2.5 and above
+  ['ESET NOD32 for Linux File servers',
+    ['/opt/eset/nod32/sbin/nod32','nod32'],
+    '--files -z --mail --sfx --rtp --adware --unsafe --pattern --heur '.
+    '-w -a --action=1 -b {}',
+    [0], [1,10], qr/^object=.*, virus="(.*?)",/m ],
+
+# Experimental, based on posting from Rado Dibarbora (Dibo) on 2002-05-31
+# ['ESET Software NOD32 Client/Server (NOD32SS)',
+#   \&ask_daemon2,    # greets with 200, persistent, terminate with QUIT
+#   ["SCAN {}/*\r\n", '127.0.0.1:8448' ],
+#   qr/^200 File OK/m, qr/^201 /m, qr/^201 (.+)/m ],
+
+  ### http://www.norman.com/products_nvc.shtml
+  ['Norman Virus Control v5 / Linux', 'nvcc',
+    '-c -l:0 -s -u -temp:$TEMPBASE {}', [0,10,11], [1,2,14],
+    qr/(?i).* virus in .* -> \'(.+)\'/m ],
+
+  ### http://www.pandasoftware.com/
+  ['Panda CommandLineSecure 9 for Linux',
+    ['/opt/pavcl/usr/bin/pavcl','pavcl'],
+    '-auto -aex -heu -cmp -nbr -nor -nos -eng -nob {}',
+    qr/Number of files infected[ .]*: 0+(?!\d)/m,
+    qr/Number of files infected[ .]*: 0*[1-9]/m,
+    qr/Found virus :\s*(\S+)/m ],
+  # NOTE: for efficiency, start the Panda in resident mode with 'pavcl -tsr'
+  # before starting amavisd - the bases are then loaded only once at startup.
+  # To reload bases in a signature update script:
+  #   /opt/pavcl/usr/bin/pavcl -tsr -ulr; /opt/pavcl/usr/bin/pavcl -tsr
+  # Please review other options of pavcl, for example:
+  #  -nomalw, -nojoke, -nodial, -nohackt, -nospyw, -nocookies
+
+# ### http://www.pandasoftware.com/
+# ['Panda Antivirus for Linux', ['pavcl'],
+#   '-TSR -aut -aex -heu -cmp -nbr -nor -nso -eng {}',
+#   [0], [0x10, 0x30, 0x50, 0x70, 0x90, 0xB0, 0xD0, 0xF0],
+#   qr/Found virus :\s*(\S+)/m ],
+
+# GeCAD AV technology is acquired by Microsoft; RAV has been discontinued.
+# Check your RAV license terms before fiddling with the following two lines!
+# ['GeCAD RAV AntiVirus 8', 'ravav',
+#   '--all --archive --mail {}', [1], [2,3,4,5], qr/Infected: (.+)/m ],
+# # NOTE: the command line switches changed with scan engine 8.5 !
+# # (btw, assigning stdin to /dev/null causes RAV to fail)
+
+  ### http://www.nai.com/
+  ['NAI McAfee AntiVirus (uvscan)', 'uvscan',
+    '--secure -rv --mime --summary --noboot - {}', [0], [13],
+    qr/(?x) Found (?:
+        \ the\ (.+)\ (?:virus|trojan)  |
+        \ (?:virus|trojan)\ or\ variant\ ([^ ]+)  |
+        :\ (.+)\ NOT\ a\ virus)/m,
+  # sub {$ENV{LD_PRELOAD}='/lib/libc.so.6'},
+  # sub {delete $ENV{LD_PRELOAD}},
+  ],
+  # NOTE1: with RH9: force the dynamic linker to look at /lib/libc.so.6 before
+  # anything else by setting environment variable LD_PRELOAD=/lib/libc.so.6
+  # and then clear it when finished to avoid confusing anything else.
+  # NOTE2: to treat encrypted files as viruses replace the [13] with:
+  #  qr/^\s{5,}(Found|is password-protected|.*(virus|trojan))/
+
+  ### http://www.virusbuster.hu/en/
+  ['VirusBuster', ['vbuster', 'vbengcl'],
+    "{} -ss -i '*' -log=$MYHOME/vbuster.log", [0], [1],
+    qr/: '(.*)' - Virus/m ],
+  # VirusBuster Ltd. does not support the daemon version for the workstation
+  # engine (vbuster-eng-1.12-linux-i386-libc6.tgz) any longer. The names of
+  # binaries, some parameters AND return codes have changed (from 3 to 1).
+  # See also the new Vexira entry 'vascan' which is possibly related.
+
+# ### http://www.virusbuster.hu/en/
+# ['VirusBuster (Client + Daemon)', 'vbengd',
+#   '-f -log scandir {}', [0], [3],
+#   qr/Virus found = (.*);/m ],
+# # HINT: for an infected file it always returns 3,
+# # although the man-page tells a different story
+
+  ### http://www.cyber.com/
+  ['CyberSoft VFind', 'vfind',
+    '--vexit {}/*', [0], [23], qr/##==>>>> VIRUS ID: CVDL (.+)/m,
+  # sub {$ENV{VSTK_HOME}='/usr/lib/vstk'},
+  ],
+
+  ### http://www.avast.com/
+  ['avast! Antivirus', ['/usr/bin/avastcmd','avastcmd'],
+    '-a -i -n -t=A {}', [0], [1], qr/\binfected by:\s+([^ \t\n\[\]]+)/m ],
+
+  ### http://www.ikarus-software.com/
+  ['Ikarus AntiVirus for Linux', 'ikarus',
+    '{}', [0], [40], qr/Signature (.+) found/m ],
+
+  ### http://www.bitdefender.com/
+  ['BitDefender', 'bdscan',  # new version
+    '--action=ignore --no-list {}', qr/^Infected files\s*:\s*0+(?!\d)/m,
+    qr/^(?:Infected files|Identified viruses|Suspect files)\s*:\s*0*[1-9]/m,
+    qr/(?:suspected|infected)\s*:\s*(.*)(?:\033|$)/m ],
+
+  ### http://www.bitdefender.com/
+  ['BitDefender', 'bdc',  # old version
+    '--arc --mail {}', qr/^Infected files *:0+(?!\d)/m,
+    qr/^(?:Infected files|Identified viruses|Suspect files) *:0*[1-9]/m,
+    qr/(?:suspected|infected): (.*)(?:\033|$)/m ],
+  # consider also: --all --nowarn --alev=15 --flev=15.  The --all argument may
+  # not apply to your version of bdc, check documentation and see 'bdc --help'
+
+  ### ArcaVir for Linux and Unix http://www.arcabit.pl/
+  ['ArcaVir for Linux', ['arcacmd','arcacmd.static'],
+    '-v 1 -summary 0 -s {}', [0], [1,2],
+    qr/(?:VIR|WIR):[ \t]*(.+)/m ],
+
+# ### a generic SMTP-client interface to a SMTP-based virus scanner
+# ['av_smtp', \&ask_av_smtp,
+#   ['{}', 'smtp:[127.0.0.1]:5525', 'dummy@localhost'],
+#   qr/^2/, qr/^5/, qr/^\s*(.*?)\s*$/m ],
+
+# ['File::Scan', sub {Amavis::AV::ask_av(sub{
+#   use File::Scan; my($fn)=@_;
+#   my($f)=File::Scan->new(max_txt_size=>0, max_bin_size=>0);
+#   my($vname) = $f->scan($fn);
+#   $f->error ? (2,"Error: ".$f->error)
+#   : ($vname ne '') ? (1,"$vname FOUND") : (0,"Clean")}, @_) },
+#   ["{}/*"], [0], [1], qr/^(.*) FOUND$/m ],
+
+# ### fully-fledged checker for JPEG marker segments of invalid length
+# ['check-jpeg',
+#   sub { use JpegTester (); Amavis::AV::ask_av(\&JpegTester::test_jpeg, @_) },
+#   ["{}/*"], undef, [1], qr/^(bad jpeg: .*)$/m ],
+# # NOTE: place file JpegTester.pm somewhere where Perl can find it,
+# #       for example in /usr/local/lib/perl5/site_perl
+
+);
+
+
+@av_scanners_backup = (
+
+  ### http://www.clamav.net/   - backs up clamd or Mail::ClamAV
+  ['ClamAV-clamscan', 'clamscan',
+    "--stdout --no-summary -r --tempdir=$TEMPBASE {}",
+    [0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
+
+# ### http://www.clamav.net/ - using remote clamd scanner as a backup
+# ['ClamAV-clamdscan', 'clamdscan',
+#   "--stdout --no-summary --config-file=/etc/clamd-client.conf {}",
+#   [0], qr/:.*\sFOUND$/m, qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
+
+# ['ClamAV-clamd-stream',
+#   \&ask_daemon, ["*", 'clamd:/var/run/clamav/clamd.sock'],
+#   qr/\bOK$/m, qr/\bFOUND$/m,
+#   qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
+
+  ### http://www.f-prot.com/   - backs up F-Prot Daemon, V6
+  ['F-PROT Antivirus for UNIX', ['fpscan'],
+    '--report --mount --adware {}',  # consider: --applications -s 4 -u 3 -z 10
+    [0,8,64],  [1,2,3, 4+1,4+2,4+3, 8+1,8+2,8+3, 12+1,12+2,12+3],
+    qr/^\[Found\s+[^\]]*\]\s+<([^ \t(>]*)/m ],
+
+  ### http://www.f-prot.com/   - backs up F-Prot Daemon (old)
+  ['FRISK F-Prot Antivirus', ['f-prot','f-prot.sh'],
+    '-dumb -archive -packed {}', [0,8], [3,6],   # or: [0], [3,6,8],
+    qr/(?:Infection:|security risk named) (.+)|\s+contains\s+(.+)$/m ],
+
+  ### http://www.trendmicro.com/   - backs up Trophie
+  ['Trend Micro FileScanner', ['/etc/iscan/vscan','vscan'],
+    '-za -a {}', [0], qr/Found virus/m, qr/Found virus (.+) in/m ],
+
+  ### http://www.sald.com/, http://drweb.imshop.de/   - backs up DrWebD
+  ['drweb - DrWeb Antivirus',  # security LHA hole in Dr.Web 4.33 and earlier
+    ['/usr/local/drweb/drweb', '/opt/drweb/drweb', 'drweb'],
+    '-path={} -al -go -ot -cn -upn -ok-',
+    [0,32], [1,9,33], qr' infected (?:with|by)(?: virus)? (.*)$'m ],
+
+   ### http://www.kaspersky.com/
+   ['Kaspersky Antivirus v5.5',
+     ['/opt/kaspersky/kav4fs/bin/kav4fs-kavscanner',
+      '/opt/kav/5.5/kav4unix/bin/kavscanner',
+      '/opt/kav/5.5/kav4mailservers/bin/kavscanner', 'kavscanner'],
+     '-i0 -xn -xp -mn -R -ePASBME {}/*', [0,10,15], [5,20,21,25],
+     qr/(?:INFECTED|WARNING|SUSPICION|SUSPICIOUS) (.*)/m,
+#    sub {chdir('/opt/kav/bin') or die "Can't chdir to kav: $!"},
+#    sub {chdir($TEMPBASE) or die "Can't chdir back to $TEMPBASE $!"},
+   ],
+
+  ### http://www.sophos.com/
+  ['Sophos Anti Virus (savscan)',   # formerly known as 'sweep'
+    ['/opt/sophos-av/bin/savscan', 'savscan'],  # 'sweep'
+    '-nb -f -all -rec -ss -sc -archive -cab -mime -oe -tnef '.
+    '--no-reset-atime {}',
+    [0,2], qr/Virus .*? found/m,
+    qr/^>>> Virus(?: fragment)? '?(.*?)'? found/m,
+  ],
+  # other options to consider: -idedir=/usr/local/sav
+  # A name 'sweep' clashes with a name of an audio editor (Debian and FreeBSD).
+  # Make sure the correct 'sweep' is found in the path if using the old name.
+
+# Always succeeds and considers mail clean.
+# Potentially useful when all other scanners fail and it is desirable
+# to let mail continue to flow with no virus checking (when uncommented).
+# ['always-clean', sub {0}],
+
+);
+
+
+1;  # insure a defined return value
diff --git a/modoboa_installer/scripts/files/amavis/05-node_id.tpl b/modoboa_installer/scripts/files/amavis/conf.d/05-node_id.tpl
similarity index 100%
rename from modoboa_installer/scripts/files/amavis/05-node_id.tpl
rename to modoboa_installer/scripts/files/amavis/conf.d/05-node_id.tpl
diff --git a/modoboa_installer/scripts/files/amavis/15-content_filter_mode.tpl b/modoboa_installer/scripts/files/amavis/conf.d/15-content_filter_mode.tpl
similarity index 100%
rename from modoboa_installer/scripts/files/amavis/15-content_filter_mode.tpl
rename to modoboa_installer/scripts/files/amavis/conf.d/15-content_filter_mode.tpl
diff --git a/modoboa_installer/scripts/files/amavis/50-user.tpl b/modoboa_installer/scripts/files/amavis/conf.d/50-user.tpl
similarity index 100%
rename from modoboa_installer/scripts/files/amavis/50-user.tpl
rename to modoboa_installer/scripts/files/amavis/conf.d/50-user.tpl
diff --git a/modoboa_installer/scripts/files/clamav/sysconfig/clamd.amavisd.tpl b/modoboa_installer/scripts/files/clamav/sysconfig/clamd.amavisd.tpl
new file mode 100644
index 0000000..ce27c53
--- /dev/null
+++ b/modoboa_installer/scripts/files/clamav/sysconfig/clamd.amavisd.tpl
@@ -0,0 +1,3 @@
+CLAMD_CONFIGFILE=/etc/clamd.d/amavisd.conf
+CLAMD_SOCKET=/var/run/clamd.amavisd/clamd.sock
+#CLAMD_OPTIONS=
diff --git a/modoboa_installer/scripts/files/clamav/tmpfiles.d/clamd.amavisd.conf.tpl b/modoboa_installer/scripts/files/clamav/tmpfiles.d/clamd.amavisd.conf.tpl
new file mode 100644
index 0000000..812e19c
--- /dev/null
+++ b/modoboa_installer/scripts/files/clamav/tmpfiles.d/clamd.amavisd.conf.tpl
@@ -0,0 +1 @@
+d /var/run/clamd.amavisd 0755 amavis amavis -
diff --git a/modoboa_installer/scripts/files/dovecot/dovecot.conf.tpl b/modoboa_installer/scripts/files/dovecot/dovecot.conf.tpl
index e72d94e..0ebb94b 100644
--- a/modoboa_installer/scripts/files/dovecot/dovecot.conf.tpl
+++ b/modoboa_installer/scripts/files/dovecot/dovecot.conf.tpl
@@ -18,6 +18,7 @@
 
 # Enable installed protocols
 !include_try /usr/share/dovecot/protocols.d/*.protocol
+%protocols
 
 # A comma separated list of IPs or hosts where to listen in for connections. 
 # "*" listens in all IPv4 interfaces, "::" listens in all IPv6 interfaces.
diff --git a/modoboa_installer/scripts/files/uwsgi/uwsgi.ini.tpl b/modoboa_installer/scripts/files/uwsgi/uwsgi.ini.tpl
index 1d26124..a013085 100644
--- a/modoboa_installer/scripts/files/uwsgi/uwsgi.ini.tpl
+++ b/modoboa_installer/scripts/files/uwsgi/uwsgi.ini.tpl
@@ -6,7 +6,9 @@ home = %modoboa_venv_path
 chdir = %modoboa_instance_path
 module = instance.wsgi:application
 master = true
-harakiri = 60
 processes = %nb_processes
 vhost = true
-no-default-app = true
\ No newline at end of file
+no-default-app = true
+socket = %uwsgi_socket_path
+chmod-socket = 660
+vacuum = true
diff --git a/modoboa_installer/scripts/modoboa.py b/modoboa_installer/scripts/modoboa.py
index 4eec27d..85244e1 100644
--- a/modoboa_installer/scripts/modoboa.py
+++ b/modoboa_installer/scripts/modoboa.py
@@ -18,9 +18,15 @@ class Modoboa(base.Installer):
 
     appname = "modoboa"
     no_daemon = True
-    packages = [
-        "build-essential", "python-dev", "libxml2-dev", "libxslt-dev",
-        "libjpeg-dev", "librrd-dev", "rrdtool", "libffi-dev", "cron"]
+    packages = {
+        "deb": [
+            "build-essential", "python-dev", "libxml2-dev", "libxslt-dev",
+            "libjpeg-dev", "librrd-dev", "rrdtool", "libffi-dev", "cron"],
+        "rpm": [
+            "gcc", "gcc-c++", "python-devel", "libxml2-devel", "libxslt-devel",
+            "libjpeg-turbo-devel", "rrdtool-devel", "rrdtool", "libffi-devel",
+        ]
+    }
     config_files = [
         "crontab=/etc/cron.d/modoboa",
         "sudoers=/etc/sudoers.d/modoboa",
@@ -102,7 +108,7 @@ class Modoboa(base.Installer):
         context.update({
             "dovecot_mailboxes_owner": (
                 self.config.get("dovecot", "mailboxes_owner")),
-            "radicale_enabled": "#" if "modoboa-radicale" in extensions else ""
+            "radicale_enabled": "" if "modoboa-radicale" in extensions else "#"
         })
         return context
 
@@ -122,6 +128,9 @@ class Modoboa(base.Installer):
             "modoboa_stats.RRD_ROOTDIR": rrd_root_dir,
             "modoboa_pdfcredentials.STORAGE_DIR": pdf_storage_dir,
         }
+        for path in ["/var/log/maillog", "/var/log/mail.log"]:
+            if os.path.exists(path):
+                settings["modoboa_stats.LOGFILE"] = path
 
         for name, value in settings.items():
             query = (
diff --git a/modoboa_installer/scripts/nginx.py b/modoboa_installer/scripts/nginx.py
index f8112c9..40ccb32 100644
--- a/modoboa_installer/scripts/nginx.py
+++ b/modoboa_installer/scripts/nginx.py
@@ -2,10 +2,12 @@
 
 import os
 
+from .. import package
 from .. import system
 from .. import utils
 
 from . import base
+from .uwsgi import Uwsgi
 
 
 class Nginx(base.Installer):
@@ -13,7 +15,10 @@ class Nginx(base.Installer):
     """Nginx installer."""
 
     appname = "nginx"
-    packages = ["nginx", "ssl-cert"]
+    packages = {
+        "deb": ["nginx", "ssl-cert"],
+        "rpm": ["nginx"]
+    }
 
     def get_template_context(self):
         """Additionnal variables."""
@@ -21,7 +26,7 @@ class Nginx(base.Installer):
         context.update({
             "modoboa_instance_path": (
                 self.config.get("modoboa", "instance_path")),
-            "uwsgi_socket_path": self.config.get("uwsgi", "socket_path")
+            "uwsgi_socket_path": Uwsgi(self.config).socket_path
         })
         return context
 
@@ -30,13 +35,21 @@ class Nginx(base.Installer):
         hostname = self.config.get("general", "hostname")
         context = self.get_template_context()
         src = self.get_file_path("nginx.conf.tpl")
-        dst = os.path.join(
-            self.config_dir, "sites-available", "{}.conf".format(hostname))
-        utils.copy_from_template(src, dst, context)
-        link = os.path.join(
-            self.config_dir, "sites-enabled", os.path.basename(dst))
-        if os.path.exists(link):
-            return
-        os.symlink(dst, link)
-        system.add_user_to_group(
-            "www-data", self.config.get("modoboa", "user"))
+        if package.backend.FORMAT == "deb":
+            dst = os.path.join(
+                self.config_dir, "sites-available", "{}.conf".format(hostname))
+            utils.copy_from_template(src, dst, context)
+            link = os.path.join(
+                self.config_dir, "sites-enabled", os.path.basename(dst))
+            if os.path.exists(link):
+                return
+            os.symlink(dst, link)
+            group = self.config.get("modoboa", "user")
+            user = "www-data"
+        else:
+            dst = os.path.join(
+                self.config_dir, "conf.d", "{}.conf".format(hostname))
+            utils.copy_from_template(src, dst, context)
+            group = "uwsgi"
+            user = "nginx"
+        system.add_user_to_group(user, group)
diff --git a/modoboa_installer/scripts/postfix.py b/modoboa_installer/scripts/postfix.py
index b9a8a63..73b6b02 100644
--- a/modoboa_installer/scripts/postfix.py
+++ b/modoboa_installer/scripts/postfix.py
@@ -1,7 +1,12 @@
 """Postfix related tools."""
 
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser
 import os
 
+from .. import package
 from .. import utils
 
 from . import base
@@ -12,16 +17,34 @@ class Postfix(base.Installer):
     """Postfix installer."""
 
     appname = "postfix"
-    packages = ["postfix"]
+    packages = {
+        "deb": ["postfix"],
+        "rpm": ["postfix"],
+    }
     config_files = ["main.cf", "master.cf"]
 
     def get_packages(self):
         """Additional packages."""
-        return self.packages + ["postfix-{}".format(self.db_driver)]
+        if package.backend.FORMAT == "deb":
+            packages = ["postfix-{}".format(self.db_driver)]
+        else:
+            packages = []
+        return super(Postfix, self).get_packages() + packages
 
     def install_packages(self):
         """Preconfigure postfix package installation."""
-        utils.preconfigure_package(
+        if "centos" in utils.dist_name():
+            config = configparser.SafeConfigParser()
+            with open("/etc/yum.repos.d/CentOS-Base.repo") as fp:
+                config.readfp(fp)
+            config.set("centosplus", "enabled", "1")
+            config.set("centosplus", "includepkgs", "postfix-*")
+            config.set("base", "exclude", "postfix-*")
+            config.set("updates", "exclude", "postfix-*")
+            with open("/etc/yum.repos.d/CentOS-Base.repo", "w") as fp:
+                config.write(fp)
+
+        package.backend.preconfigure(
             "postfix", "main_mailer_type", "select", "No configuration")
         super(Postfix, self).install_packages()
 
@@ -63,6 +86,17 @@ class Postfix(base.Installer):
                     " ".join(extensions), db_url, self.config_dir))
         utils.exec_cmd(cmd)
 
+        # Check chroot directory
+        chroot_dir = "/var/spool/postfix/etc"
+        chroot_files = ["services", "resolv.conf"]
+        if not os.path.exists(chroot_dir):
+            os.mkdir(chroot_dir)
+        for f in chroot_files:
+            path = os.path.join(chroot_dir, f)
+            if not os.path.exists(path):
+                utils.copy_file(os.path.join("/etc", f), path)
+
         # Generate EDH parameters
-        cmd = "openssl dhparam -out dh2048.pem 2048"
-        utils.exec_cmd(cmd, cwd=self.config_dir)
+        if not os.path.exists("{}/dh2048.pem".format(self.config_dir)):
+            cmd = "openssl dhparam -out dh2048.pem 2048"
+            utils.exec_cmd(cmd, cwd=self.config_dir)
diff --git a/modoboa_installer/scripts/razor.py b/modoboa_installer/scripts/razor.py
index 035b64e..7f5f965 100644
--- a/modoboa_installer/scripts/razor.py
+++ b/modoboa_installer/scripts/razor.py
@@ -15,7 +15,10 @@ class Razor(base.Installer):
 
     appname = "razor"
     no_daemon = True
-    packages = ["razor"]
+    packages = {
+        "deb": ["razor"],
+        "rpm": ["perl-Razor-Agent"]
+    }
 
     def post_run(self):
         """Additional tasks."""
@@ -27,13 +30,13 @@ class Razor(base.Installer):
             stat.S_IROTH | stat.S_IXOTH,
             pw[2], pw[3]
         )
-        path = os.path.join(self.config.get("amavis", "home_dir"), ".razor")
+        path = os.path.join(pw[5], ".razor")
         utils.mkdir(path, stat.S_IRWXU, pw[2], pw[3])
         utils.exec_cmd("razor-admin -home {} -create".format(path))
         utils.copy_file(
             os.path.join(path, "razor-agent.conf"), self.config_dir)
         utils.exec_cmd("razor-admin -home {} -discover".format(path),
-                       sudo_user=user)
+                       sudo_user=user, login=False)
         utils.exec_cmd("razor-admin -home {} -register".format(path),
-                       sudo_user=user)
+                       sudo_user=user, login=False)
         # FIXME: move log file to /var/log ?
diff --git a/modoboa_installer/scripts/spamassassin.py b/modoboa_installer/scripts/spamassassin.py
index e09cf99..8f44877 100644
--- a/modoboa_installer/scripts/spamassassin.py
+++ b/modoboa_installer/scripts/spamassassin.py
@@ -1,5 +1,8 @@
 """Spamassassin related functions."""
 
+import os
+
+from .. import package
 from .. import utils
 
 from . import base
@@ -12,16 +15,28 @@ class Spamassassin(base.Installer):
 
     appname = "spamassassin"
     no_daemon = True
-    packages = ["spamassassin", "pyzor"]
+    packages = {
+        "deb": ["spamassassin", "pyzor"],
+        "rpm": ["spamassassin", "pyzor"]
+    }
     with_db = True
     config_files = ["v310.pre", "local.cf"]
 
     def get_sql_schema_path(self):
         """Return SQL schema."""
         if self.dbengine == "postgres":
-            schema = "/usr/share/doc/spamassassin/sql/bayes_pg.sql"
+            fname = "bayes_pg.sql"
         else:
-            schema = "/usr/share/doc/spamassassin/sql/bayes_mysql.sql"
+            fname = "bayes_mysql.sql"
+        schema = "/usr/share/doc/spamassassin/sql/{}".format(fname)
+        if not os.path.exists(schema):
+            version = package.backend.get_installed_version("spamassassin")
+            version = version.replace(".", "_")
+            url = (
+                "http://svn.apache.org/repos/asf/spamassassin/tags/"
+                "spamassassin_release_{}/sql/{}".format(version, fname))
+            schema = "/tmp/{}".format(fname)
+            utils.exec_cmd("wget {} -O {}".format(url, schema))
         return schema
 
     def get_template_context(self):
@@ -40,5 +55,7 @@ class Spamassassin(base.Installer):
     def post_run(self):
         """Additional tasks."""
         utils.exec_cmd(
-            "pyzor discover", sudo_user=self.config.get("amavis", "user"))
+            "pyzor discover", sudo_user=self.config.get("amavis", "user"),
+            login=False
+        )
         install("razor", self.config)
diff --git a/modoboa_installer/scripts/uwsgi.py b/modoboa_installer/scripts/uwsgi.py
index ea07198..4da9c1a 100644
--- a/modoboa_installer/scripts/uwsgi.py
+++ b/modoboa_installer/scripts/uwsgi.py
@@ -2,6 +2,8 @@
 
 import os
 
+from .. import package
+from .. import system
 from .. import utils
 
 from . import base
@@ -12,7 +14,17 @@ class Uwsgi(base.Installer):
     """uWSGI installer."""
 
     appname = "uwsgi"
-    packages = ["uwsgi", "uwsgi-plugin-python"]
+    packages = {
+        "deb": ["uwsgi", "uwsgi-plugin-python"],
+        "rpm": ["uwsgi", "uwsgi-plugin-python"],
+    }
+
+    @property
+    def socket_path(self):
+        """Return socket path."""
+        if package.backend.FORMAT == "deb":
+            return "/run/uwsgi/app/modoboa_instance/socket"
+        return "/run/uwsgi/modoboa_instance.sock"
 
     def get_template_context(self):
         """Additionnal variables."""
@@ -22,22 +34,37 @@ class Uwsgi(base.Installer):
             "modoboa_venv_path": self.config.get("modoboa", "venv_path"),
             "modoboa_instance_path": (
                 self.config.get("modoboa", "instance_path")),
-            "uwsgi_socket_path": self.config.get("uwsgi", "socket_path")
+            "uwsgi_socket_path": self.socket_path,
         })
         return context
 
+    def get_config_dir(self):
+        """Return appropriate configuration directory."""
+        if package.backend.FORMAT == "deb":
+            return os.path.join(self.config_dir, "apps-available")
+        return "{}.d".format(self.config_dir)
+
     def post_run(self):
         """Additionnal tasks."""
         context = self.get_template_context()
         src = self.get_file_path("uwsgi.ini.tpl")
-        dst = os.path.join(
-            self.config_dir, "apps-available", "modoboa_instance.ini")
+        dst = os.path.join(self.get_config_dir(), "modoboa_instance.ini")
         utils.copy_from_template(src, dst, context)
-        link = os.path.join(
-            self.config_dir, "apps-enabled", os.path.basename(dst))
-        if os.path.exists(link):
-            return
-        os.symlink(dst, link)
+        if package.backend.FORMAT == "deb":
+            link = os.path.join(
+                self.config_dir, "apps-enabled", os.path.basename(dst))
+            if os.path.exists(link):
+                return
+            os.symlink(dst, link)
+        else:
+            system.add_user_to_group(
+                self.config.get("modoboa", "user"), "uwsgi")
+            utils.exec_cmd("chmod -R g+w {}/media".format(
+                self.config.get("modoboa", "instance_path")))
+            pattern = (
+                "s/emperor-tyrant = true/emperor-tyrant = false/")
+            utils.exec_cmd(
+                "perl -pi -e '{}' /etc/uwsgi.ini".format(pattern))
 
     def restart_daemon(self):
         """Restart daemon process."""
diff --git a/modoboa_installer/ssl.py b/modoboa_installer/ssl.py
new file mode 100644
index 0000000..3b996b9
--- /dev/null
+++ b/modoboa_installer/ssl.py
@@ -0,0 +1,49 @@
+"""SSL tools."""
+
+import os
+
+from . import utils
+
+
+class CertificateBackend(object):
+    """Base class."""
+
+    def __init__(self, config):
+        """Set path to certificates."""
+        self.config = config
+        for base_dir in ["/etc/pki/tls", "/etc/ssl"]:
+            if os.path.exists(base_dir):
+                self.config.set(
+                    "general", "tls_key_file",
+                    "{}/private/%(hostname)s.key".format(base_dir))
+                self.config.set(
+                    "general", "tls_cert_file",
+                    "{}/certs/%(hostname)s.cert".format(base_dir))
+                return
+        raise RuntimeError("Cannot find a directory to store certificate")
+
+
+class SelfSignedCertificate(CertificateBackend):
+    """Create a self signed certificate."""
+
+    def create(self):
+        """Create a certificate."""
+        if os.path.exists(self.config.get("general", "tls_key_file")):
+            answer = utils.user_input(
+                "Overwrite the existing SSL certificate? (y/N) ")
+            if not answer.lower().startswith("y"):
+                return
+        utils.printcolor(
+            "Generating new self-signed certificate", utils.YELLOW)
+        utils.exec_cmd(
+            "openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 "
+            "-subj '/CN={}' -keyout {} -out {}".format(
+                self.config.get("general", "hostname"),
+                self.config.get("general", "tls_key_file"),
+                self.config.get("general", "tls_cert_file"))
+        )
+
+
+def get_backend(config):
+    """Return the appropriate backend."""
+    return SelfSignedCertificate(config)
diff --git a/modoboa_installer/system.py b/modoboa_installer/system.py
index ba84878..bf88374 100644
--- a/modoboa_installer/system.py
+++ b/modoboa_installer/system.py
@@ -19,6 +19,8 @@ def create_user(name, home=None):
     if home:
         cmd += "-d {} ".format(home)
     utils.exec_cmd("{} {}".format(cmd, name))
+    if home:
+        utils.exec_cmd("chmod 755 {}".format(home))
 
 
 def add_user_to_group(user, group):
@@ -34,3 +36,8 @@ def add_user_to_group(user, group):
         print("Group {} does not exist".format(group))
         sys.exit(1)
     utils.exec_cmd("usermod -a -G {} {}".format(group, user))
+
+
+def enable_service(name):
+    """Enable a service at startup."""
+    utils.exec_cmd("systemctl enable {}".format(name))
diff --git a/modoboa_installer/utils.py b/modoboa_installer/utils.py
index 4986eff..0550f5e 100644
--- a/modoboa_installer/utils.py
+++ b/modoboa_installer/utils.py
@@ -33,7 +33,7 @@ def user_input(message):
     return answer
 
 
-def exec_cmd(cmd, sudo_user=None, pinput=None, **kwargs):
+def exec_cmd(cmd, sudo_user=None, pinput=None, login=True, **kwargs):
     """Execute a shell command.
     Run a command using the current user. Set :keyword:`sudo_user` if
     you need different privileges.
@@ -45,7 +45,7 @@ def exec_cmd(cmd, sudo_user=None, pinput=None, **kwargs):
     """
     sudo_user = ENV.get("sudo_user", sudo_user)
     if sudo_user is not None:
-        cmd = "sudo -i -u %s %s" % (sudo_user, cmd)
+        cmd = "sudo {}-u {} {}".format("-i " if login else "", sudo_user, cmd)
     if "shell" not in kwargs:
         kwargs["shell"] = True
     if pinput is not None:
@@ -73,26 +73,6 @@ def dist_name():
     return "unknown" if not name else name.lower()
 
 
-def preconfigure_package(name, question, qtype, answer):
-    """Pre-configure a package before installation."""
-    line = "{0} {0}/{1} {2} {3}".format(name, question, qtype, answer)
-    exec_cmd("echo '{}' | debconf-set-selections".format(line))
-
-
-def install_system_package(name, update=False):
-    """Install a package system-wide."""
-    if update:
-        exec_cmd("apt-get update --quiet")
-    exec_cmd("apt-get install --quiet --assume-yes {}".format(name))
-
-
-def install_system_packages(names, update=False):
-    """Install some packages system-wide."""
-    if update:
-        exec_cmd("apt-get update --quiet")
-    exec_cmd("apt-get install --quiet --assume-yes {}".format(" ".join(names)))
-
-
 def mkdir(path, mode, uid, gid):
     """Create a directory."""
     if not os.path.exists(path):
diff --git a/run.py b/run.py
index f5be1c2..756cc30 100755
--- a/run.py
+++ b/run.py
@@ -10,6 +10,8 @@ except ImportError:
 
 from modoboa_installer import scripts
 from modoboa_installer import utils
+from modoboa_installer import package
+from modoboa_installer import ssl
 
 
 def main():
@@ -29,6 +31,8 @@ def main():
     config = configparser.SafeConfigParser()
     with open("installer.cfg") as fp:
         config.readfp(fp)
+    if not config.has_section("general"):
+        config.add_section("general")
     config.set("general", "hostname", args.hostname)
     utils.printcolor(
         "Your mail server {} will be installed with the following components:"
@@ -50,7 +54,8 @@ def main():
         "The process can be long, feel free to take a coffee "
         "and come back later ;)", utils.BLUE)
     utils.printcolor("Starting...", utils.GREEN)
-    utils.install_system_package("sudo", update=True)
+    package.backend.install("sudo")
+    ssl.get_backend(config).create()
     scripts.install("modoboa", config)
     scripts.install("postfix", config)
     scripts.install("amavis", config)