Using a new 'Perfect Setup' server on a Debian 3.1-Sarge build, almost everything is working great! BUT, when Thunderbird logs in to the pop3 server it throws this error: 'You have attempted to establish a connection with "someurl.com". However, the security certificate presented belongs to "localhost". ' The message goes away if I disable TLS in Thunderbird, but I'd like to make it work. I tried re-running generation of the certificate using openssl in the manner described in this thread: http://www.howtoforge.com/forums/showthread.php?t=1016 ...I ran those commands, restarted postfix, but it didn't resolve the problem. Clearly a certificate is being issued and forwarded to Thunderbird, but it is mislabeled some how. BTW, this body of work is wonderful! My deep gratitude to Mr. Timmes, and all the contributors to this forum!!! Elliott BTW, I do have ISPConfig working with this set up, too. If I need to regenerate the certificates with some corrections/editing, can ISPConfig help with that? Learning as I go!