[Dovecot] error log?

Hello,

for some reason dovecot doesn't start up. I'm using the default values in dovecot.conf, just changed the login_user, disabled ssl and ran sbin/dovecot, but nothing happens. No error's, I can't find any logs, no daemon anywhere, no ports bound... I don't know where to look and whatfor. I compiled with --enable-debug, but there's no extra output. Any ideas?

Regards Marten Lehmann