diff --git a/modoboa_installer/scripts/base.py b/modoboa_installer/scripts/base.py
index 104ba4f..ef775e3 100644
--- a/modoboa_installer/scripts/base.py
+++ b/modoboa_installer/scripts/base.py
@@ -42,6 +42,20 @@ class Installer(object):
         self.dbuser = self.config.get(self.appname, "dbuser")
         self.dbpasswd = self.config.get(self.appname, "dbpassword")
 
+    @property
+    def modoboa_2_2_or_greater(self):
+        # Check if modoboa version > 2.2
+        modoboa_version = python.get_package_version(
+            "modoboa",
+            self.self.config.get("modoboa", "venv_path"),
+            sudo_user=self.config.get("modoboa", "user")
+            )
+        condition = (
+            (modoboa_version[0] == 2 and modoboa_version[1] >= 2) or
+            modoboa_version[0] > 2
+            )
+        return condition
+
     @property
     def config_dir(self):
         """Return main configuration directory."""
diff --git a/modoboa_installer/scripts/dovecot.py b/modoboa_installer/scripts/dovecot.py
index 8f0ca08..321a342 100644
--- a/modoboa_installer/scripts/dovecot.py
+++ b/modoboa_installer/scripts/dovecot.py
@@ -31,22 +31,6 @@ class Dovecot(base.Installer):
         "conf.d/10-master.conf", "conf.d/20-lmtp.conf", "conf.d/10-ssl-keys.try"]
     with_user = True
 
-    def __init__(self, *args, **kwargs):
-        super.__init__(*args, **kwargs)
-        # Check if modoboa version > 2.2
-        modoboa_version = python.get_package_version(
-            "modoboa",
-            self.config.get("modoboa", "venv_path"),
-            sudo_user=self.user
-            )
-        self.modoboa_2_2_or_greater = False
-        condition = (
-            (modoboa_version[0] == 2 and modoboa_version[1] >= 2) or
-            modoboa_version[0] > 2
-            )
-        if condition:
-            self.modoboa_2_2_or_greater = True
-
     def setup_user(self):
         """Setup mailbox user."""
         super().setup_user()
diff --git a/modoboa_installer/scripts/modoboa.py b/modoboa_installer/scripts/modoboa.py
index 2b36c8c..a2f683c 100644
--- a/modoboa_installer/scripts/modoboa.py
+++ b/modoboa_installer/scripts/modoboa.py
@@ -63,22 +63,6 @@ class Modoboa(base.Installer):
         self.opendkim_enabled = self.config.getboolean("opendkim", "enabled")
         self.dkim_cron_enabled = False
 
-        # Check if modoboa version > 2.2
-        modoboa_version = python.get_package_version(
-            "modoboa",
-            self.venv_path,
-            sudo_user=self.user
-            )
-        self.modoboa_2_2_or_greater = False
-        condition = (
-            (modoboa_version[0] == 2 and modoboa_version[1] >= 2) or
-            modoboa_version[0] > 2
-            )
-        if condition:
-            self.modoboa_2_2_or_greater = True
-        if not self.modoboa_2_2_or_greater and self.opendkim_enabled:
-            self.dkim_cron_enabled = True
-
     def is_extension_ok_for_version(self, extension, version):
         """Check if extension can be installed with this modo version."""
         if extension not in compatibility_matrix.EXTENSIONS_AVAILABILITY:
@@ -244,6 +228,8 @@ class Modoboa(base.Installer):
         extensions = self.config.get("modoboa", "extensions")
         extensions = extensions.split()
         random_hour = random.randint(0, 6)
+        self.dkim_cron_enabled = (not self.modoboa_2_2_or_greater and
+                                  self.opendkim_enabled)
         context.update({
             "sudo_user": (
                 "uwsgi" if package.backend.FORMAT == "rpm" else context["user"]