diff --git a/lib/configfiles/rhel_centos.xml b/lib/configfiles/rhel_centos.xml
index 0aaa4043..a720f2d1 100644
--- a/lib/configfiles/rhel_centos.xml
+++ b/lib/configfiles/rhel_centos.xml
@@ -176,10 +176,10 @@ query = SELECT gid FROM mail_users WHERE email = '%s'
 						backup="true">
 						<content><![CDATA[
 ## General Postfix configuration
-
+# FQDN from Froxlor
 mydomain = <SERVERNAME>
 
-# should be different from $mydomain eg. "mail.$mydomain"
+# set myhostname to $mydomain because Froxlor alrady uses a FQDN
 myhostname = $mydomain
 
 mydestination = $myhostname,