Relay Problem Again 554 554 5.7.1 Hi! I followed exactly step-by-step of ISPConfig perfect setup on SuSE 11.0 and almost everything went fine. I am endlessly have the same problem which was described before but has no definitive solution - 554 554 5.7.1 relay problem with Postfix receiving mails. Sending is OK, no problem. If I send e-mail from external e-mail server to email@example.com, everything is OK, however, when I send e-mail to [email protected], I am always get this 554 554 5.7.1 error: Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 554 554 5.7.1 <[email protected] Anyone can suggest what could be the problem? PS. I found quick and dirty solution, which is really awkward by any means. I have created a co-domain "mydomain.com" without hostname (mail.mydomain.com). Basically, e-mail have started to work now. I think some kind of manual is needed to understand how ISPConfig works. I am still messing with DNS files generated by ISPConfig which are simply put odd.