On 5.1.2010, at 16.26, Anthony Nedland wrote: > For example, I sent to du...@baldtel.com from an external address. The server > returned the error 'user duane does not exist' in the form of an > undeliverable bounce back email.
Set auth_debug=yes. Show what deliver logs (http://wiki.dovecot.org/LDA#Logging) and what dovecot-auth logs. If you can't see deliver logging anything, show what Postfix logs about the deliver.
