Backup Configuration Postfix Saved My Ass
Suddenly my girlfriend server goes wrong and with freaking errors. It is blocking Gmail!!! 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 Service unavailable; Client host [209.85.216.198] blocked using blah blah blah check check check Good thing I have a backup main.cf and just reloaded it and walah! no downtime :D