diff --git a/Metadata/groups.xml b/Metadata/groups.xml
index dfc6f9a..e5128cc 100644
--- a/Metadata/groups.xml
+++ b/Metadata/groups.xml
@@ -860,6 +860,7 @@
     <Group name="mail-backend"/>
     <Group name="db"/>
     <Group name="postfix.transport"/>
+    <Bundle name="check_cert" /><!-- Certif postfix ssmtp(port 465) -->
   </Group>
 
   <Group name="greylisting"
@@ -1113,7 +1114,6 @@
 
   <Group name="postfix"
     category="mail-backend">
-   <Bundle name="check_cert" /><!-- Certif postfix ssmtp(port 465) -->
    <Bundle name="postfix"/>
    <Bundle name="postfix_aliases"/>
    <Bundle name="postfix_transport"/>
diff --git a/Python/etc/cron.d/check_cert b/Python/etc/cron.d/check_cert
index 6332c1d..59fd19c 100644
--- a/Python/etc/cron.d/check_cert
+++ b/Python/etc/cron.d/check_cert
@@ -40,6 +40,6 @@ if has('vpn'):
 if has('xmpp'):
     check_cert(filename='/etc/ssl/certs/jabber_server.pem', user='jabber')
 
-if has('postfix'):
+if has('mail-mx'):
     check_cert('localhost', 465)