diff --git a/modoboa_installer/compatibility_matrix.py b/modoboa_installer/compatibility_matrix.py
index 9377c49..ac68194 100644
--- a/modoboa_installer/compatibility_matrix.py
+++ b/modoboa_installer/compatibility_matrix.py
@@ -37,3 +37,10 @@ REMOVED_EXTENSIONS = {
     "modoboa-radicale": "2.4.0",
     "modoboa-webmail": "2.4.0",
 }
+
+APP_INCOMPATIBILITY = {
+    "opendkim": ["rspamd"],
+    "amavis": ["rspamd"],
+    "postwhite": ["rspamd"],
+    "spamassassin": ["rspamd"]
+}
diff --git a/modoboa_installer/config_dict_template.py b/modoboa_installer/config_dict_template.py
index c7c1b97..4d82cee 100644
--- a/modoboa_installer/config_dict_template.py
+++ b/modoboa_installer/config_dict_template.py
@@ -244,11 +244,11 @@ ConfigDictTemplate = [
                 "default": "/var/lib/dkim"
             },
             {
-                "option": "keys_path_map",
+                "option": "key_map_path",
                 "default": "/var/lib/dkim/keys.path.map"
             },
             {
-                "option": "selectors_path_map",
+                "option": "selector_map_path",
                 "default": "/var/lib/dkim/selectors.path.map"
             },
             {
@@ -392,7 +392,7 @@ ConfigDictTemplate = [
         "values": [
             {
                 "option": "enabled",
-                "default": "true",
+                "default": "false",
             },
             {
                 "option": "config_dir",
diff --git a/modoboa_installer/scripts/files/modoboa/supervisor-rq-dkim.tpl b/modoboa_installer/scripts/files/modoboa/supervisor-rq-dkim.tpl
index 42d9bd0..531650e 100644
--- a/modoboa_installer/scripts/files/modoboa/supervisor-rq-dkim.tpl
+++ b/modoboa_installer/scripts/files/modoboa/supervisor-rq-dkim.tpl
@@ -3,7 +3,7 @@ autostart=true
 autorestart=true
 command=%{venv_path}/bin/python %{home_dir}/instance/manage.py rqworker dkim
 directory=%{home_dir}
-user=%{opendkim_user}
+user=%{dkim_user}
 redirect_stderr=true
 numprocs=1
 stopsignal=TERM
diff --git a/modoboa_installer/scripts/modoboa.py b/modoboa_installer/scripts/modoboa.py
index e98a5b7..835ebe4 100644
--- a/modoboa_installer/scripts/modoboa.py
+++ b/modoboa_installer/scripts/modoboa.py
@@ -248,6 +248,7 @@ class Modoboa(base.Installer):
             "dovecot_mailboxes_owner": (
                 self.config.get("dovecot", "mailboxes_owner")),
             "opendkim_user": self.config.get("opendkim", "user"),
+            "dkim_user":  "_rspamd" if self.config.getboolean("rspamd", "enabled") else self.config.get("opendkim", "user")
             "minutes": random.randint(1, 59),
             "hours": f"{random_hour},{random_hour+12}",
             "modoboa_2_2_or_greater": "" if self.modoboa_2_2_or_greater else "#",
@@ -291,6 +292,15 @@ class Modoboa(base.Installer):
         if self.config.getboolean("opendkim", "enabled"):
             settings["admin"]["dkim_keys_storage_dir"] = (
                 self.config.get("opendkim", "keys_storage_dir"))
+
+        if self.config.getboolean("rspamd", "enabled"):
+            settings["admin"]["dkim_keys_storage_dir"] = (
+                self.config.get("rspamd", "dkim_keys_storage_dir"))
+            settings["modoboa_rspamd"]["key_map_path"] = (
+                self.config.get("rspamd", "key_map_path"))
+            settings["modoboa_rspamd"]["selector_map_path"] = (
+                self.config.get("rspamd", "selector_map_path"))
+
         settings = json.dumps(settings)
         query = (
             "UPDATE core_localconfig SET _parameters='{}'"
diff --git a/modoboa_installer/scripts/rspamd.py b/modoboa_installer/scripts/rspamd.py
index 7313ffa..d0c9bd1 100644
--- a/modoboa_installer/scripts/rspamd.py
+++ b/modoboa_installer/scripts/rspamd.py
@@ -60,8 +60,7 @@ class Rspamd(base.Installer):
 
     def install_config_files(self):
         """Make sure config directory exists."""
-        user = self.config.get("modoboa", "user")
-        pw = pwd.getpwnam(user)
+        pw = pwd.getpwnam("_rspamd")
         targets = [
             [self.app_config["dkim_keys_storage_dir"], pw[2], pw[3]]
         ]
diff --git a/modoboa_installer/utils.py b/modoboa_installer/utils.py
index a9cd5f4..6c6c178 100644
--- a/modoboa_installer/utils.py
+++ b/modoboa_installer/utils.py
@@ -19,6 +19,7 @@ except ImportError:
     import ConfigParser as configparser
 
 from . import config_dict_template
+from . import compatibility_matrix.APP_INCOMPATIBILITY
 
 
 ENV = {}
@@ -504,3 +505,15 @@ def create_oauth2_app(app_name: str, client_id: str, config) -> tuple[str, str]:
     )
     exec_cmd(cmd)
     return client_id, client_secret
+
+
+def check_app_compatibility(section, config):
+    """Check that the app can be installed in regards to other enabled apps."""
+    incompatible_app = []
+    if section in APP_INCOMPATIBILITY.keys():
+        for app in APP_INCOMPATIBILITY[section]:
+            if config.getboolean(app, "enabled"):
+                error(f"{section} cannont be installed if {app} is enabled. "
+                      "Please disable one of them.")
+                incompatible_app.append(app)
+    return len(incompatible_app) == 0
diff --git a/run.py b/run.py
index 22cfa14..fa8c60c 100755
--- a/run.py
+++ b/run.py
@@ -22,14 +22,13 @@ from modoboa_installer import utils
 
 
 PRIMARY_APPS = [
-    "amavis",
     "fail2ban",
     "modoboa",
     "automx",
     "radicale",
     "uwsgi",
     "nginx",
-    "opendkim",
+    "rspamd",
     "postfix",
     "dovecot"
 ]
@@ -261,6 +260,7 @@ def main(input_args):
 
     # Show concerned components
     components = []
+    incompatible_app_detected = False
     for section in config.sections():
         if section in ["general", "database", "mysql", "postgres",
                        "certificate", "letsencrypt", "backup"]:
@@ -268,7 +268,10 @@ def main(input_args):
         if (config.has_option(section, "enabled") and
                 not config.getboolean(section, "enabled")):
             continue
+        incompatible_app_detected = utils.check_app_compatibility(section, config)
         components.append(section)
+    if incompatible_app_detected:
+        sys.exit(0)
     utils.printcolor(" ".join(components), utils.YELLOW)
     if not args.force:
         answer = utils.user_input("Do you confirm? (Y/n) ")