I'm following the wiki on Debian Sarge, and I just got to the part that says 'test everything before proceeding'. I can send out just fine, but when I try to reply to the message, it just disappears.

Hmm.. I think you might want to look at authenticated outbound SMTP, and talk to the university SMTP server. To do this, you need SASL support enabled, and you can tell postfix to authenticate to the ...

Unless you're a sysadmin you don't generally have to worry that much about getting email delivered, you just hookup your GUI email client to your external email account and you're done. But what if ...