Hey Guy's. Guess this will be aimed at Falko and till... I've got a working installation of ISPConfig on Ubuntu 7.04. 3 domains where registered and working 100% On my 4th I started having issues with mail clients. You can send mails fine, but when people reply or want to send you a mail, they get an ERROR 554 (No relay) replay. This was using a GMail account for instance: "Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 13): 554 5.7.1 <[email protected]>: Relay access denied" After some searching I got to a post mentioning the "local-host-names" and "virtusertable" files under "/etc/postfix/" directory. I checked them out and came to the conclusion that when adding these new mail users, incorrect entries where made for them - example: Mail User - [email protected] 2 entries: 1 - [email protected] 2 - user@domain Instead of (all the previous working entries looked like this) 1 - [email protected] 2 - user@domain.here When manually edited, it seems to working fine. I thought I'll post this for other users with this issue and to let you know of a possible bug - if indeed it might be a bug. I will try to update to V 2.2.15 tonight (my first upgrade). Wish me luck