First of all, thank you for this purely awesome HowTo: http://www.howtoforge.com/perfect-server-ubuntu-12.04-lts-apache2-bind-dovecot-ispconfig-3 I've followed it step by step from scratch for several times now, but I still can't figure out what causes this one problem: I can't receive emails. I can send them (with Squirrelmail or Thunderbird), but I can not receive any. In ISPConfig: I've created a domain, I have created a mailbox and so on... It actually seems to work well, but here's what mail.log says about incoming emails: Code: Sep 12 22:06:03 j31256 postfix/local: 336741AF8: to=<firstname.lastname@example.org>, relay=local, delay=0.03, delays=0.01/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user: "info") And no, there actually is no Linux-user called "info", but I've created a corresponding mailbox in ISPConfig, so it should still work... but it doesn't. It also does not work properly for existing Linux-users. Any ideas would be really appreciated!