I've followed the tutorial and everything works great. I've got my mail up and running (installed squirrelmail). I've setup thunderbird to recive the mails too, the problem is sending mail from thunderbird. In the maillog I can see that thunderbird connects, then it just hangs until it timesout. I can telnet to the server from the same computer thunderbird is installed on. The server is a VPS with an older kernel... 2.6.18-028stab068.9 #1 SMP Tue Mar 30 17:22:31 MSD 2010 x86_64 x86_64 x86_64 GNU/Linux I got errors when I tried to install the "base" package. Everything else seems to work ok though.. Any ideas? My guess is that my postfix configuration is off. But I've followed the guide all the way.