diff --git a/modoboa_installer/database.py b/modoboa_installer/database.py
index 84bf12b..3ce77c9 100644
--- a/modoboa_installer/database.py
+++ b/modoboa_installer/database.py
@@ -123,9 +123,9 @@ class MySQL(Database):
 
     packages = {
         "deb": ["mysql-server", "libmysqlclient-dev"],
-        "rpm": ["mariadb", "mariadb-devel"],
+        "rpm": ["mariadb", "mariadb-devel","mariadb-server"],
     }
-    service = "mysql"
+    service = "mariadb" if package.backend.FORMAT == "rpm" else "mysql"
 
     def install_package(self):
         """Preseed package installation."""
@@ -134,9 +134,11 @@ class MySQL(Database):
         package.backend.preconfigure(
             "mysql-server", "root_password_again", "password", self.dbpassword)
         super(MySQL, self).install_package()
+        if package.backend.FORMAT == "rpm":
+        	utils.exec_cmd("mysqladmin -u root password '{}'".format(self.dbpassword))
 
     def _exec_query(self, query, dbname=None, dbuser=None, dbpassword=None):
-        """Exec a postgresql query."""
+        """Exec a mysql query."""
         if dbuser is None and dbpassword is None:
             dbuser = self.dbuser
             dbpassword = self.dbpassword
@@ -150,6 +152,9 @@ class MySQL(Database):
         self._exec_query(
             "CREATE USER '{}'@'%' IDENTIFIED BY '{}'".format(
                 name, password))
+        self._exec_query(
+            "CREATE USER '{}'@'localhost' IDENTIFIED BY '{}'".format(
+                name, password))
 
     def create_database(self, name, owner):
         """Create a database."""
@@ -162,6 +167,9 @@ class MySQL(Database):
         self._exec_query(
             "GRANT ALL PRIVILEGES ON {}.* to '{}'@'%'"
             .format(dbname, user))
+        self._exec_query(
+            "GRANT ALL PRIVILEGES ON {}.* to '{}'@'localhost'"
+            .format(dbname, user))
 
     def load_sql_file(self, dbname, dbuser, dbpassword, path):
         """Load SQL file."""
diff --git a/modoboa_installer/ssl.py b/modoboa_installer/ssl.py
index 9bfb366..a28bbdc 100644
--- a/modoboa_installer/ssl.py
+++ b/modoboa_installer/ssl.py
@@ -11,16 +11,19 @@ class CertificateBackend(object):
     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")
+        if not config.has_option("general", "tls_key_file"):
+            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")
+        else:
+            return
 
 
 class SelfSignedCertificate(CertificateBackend):