I too followed the Virtual User How-To for Ubuntu 8.04 located here. I have read several other threads that are similar to my problem, but haven't been exactly the same. I too am getting the relay access denied error, but I have a SASL Login authentication error in my logs. Specifically, it says Permission denied. Code: Jun 6 15:17:28 gopher postfix/smtpd[20679]: connect from 72-56-203-221.area2.spcsdns.net[72.56.203.221] Jun 6 15:17:32 gopher postfix/smtpd[20679]: warning: SASL authentication failure: cannot connect to saslauthd server: Permission denied Jun 6 15:17:32 gopher postfix/smtpd[20679]: warning: 72-56-203-221.area2.spcsdns.net[72.56.203.221]: SASL LOGIN authentication failed: generic failure Jun 6 15:17:33 gopher postfix/smtpd[20679]: warning: SASL authentication failure: cannot connect to saslauthd server: Permission denied Jun 6 15:17:33 gopher postfix/smtpd[20679]: warning: 72-56-203-221.area2.spcsdns.net[72.56.203.221]: SASL LOGIN authentication failed: generic failure Jun 6 15:17:34 gopher postfix/smtpd[20679]: disconnect from 72-56-203-221.area2.spcsdns.net[72.56.203.221] Thanks.
I think you forgot to do this: Code: adduser postfix sasl ( http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-ubuntu8.04-p2 ) Restart Postfix and saslaithd afterwards.