I followed this tutorial: http://www.howtoforge.com/virtual_postfix_mysql_quota_courier I can login to courier/pop3 just fine. after creating maildirs, of course. but postfix says i've no mail users. it bounces any mail and i cant authentificate to smtp too :/ if i try to login to smtp manually trough telnet, i get "malformed auth response" error after enterin username. I've looked trough all postfix config files twice. MySQL login information seems to be correct.