Postfix unable to receive any mails
Recently I follow Falko's tutorial - The Perfect Setup Ubuntu Feisty Fawn 7.04 server and managed to get everything working. One thing that seem to be missing was that Postfix seems not receiving any mails for example.com domain, although sending mail works flawlessly.
When I tried sending mails to example.com, gets these error
554 5.7.1 Relay Access Denied
554 5.0.0 Service unavailable and
554 5.5.1 No valid recipients
any advice or help would be appreciated