Hello, I followed the tutorial for Postfix on Ubuntu 11.10 as well as the workaround for the no mechanism found bug. Everything was working fine, and then... "New packages found... updating..." Apparently, SASL updated to the version that has the problem. Okay, so I followed the downgrade steps again, but now in my mail.log I simply see: Code: warning: unknown[192.168.1.1]: SASL LOGIN authentication failed: authentication failure Courier authenticates fine. I thought it might have been a firewall issue, so I temporarily disabled it. No luck... Anyone have any thoughts?