Update etc_ferm_ferm.conf

roles/common/files/etc_ferm_ferm.conf

 
         # expose our services to the world:
         # dns, web, ssh, imap + ssl, smtp + ssl, znc
-        proto tcp dport (53 http https ssh 993 465 6697) ACCEPT;
+        proto tcp dport (25 53 http https ssh 993 465 6697) ACCEPT;
 
         # openvpn
         proto udp dport 1194 ACCEPT;