Symptoms

Emails are not received, the following error appears in mail log:

postfix/trivial-rewrite[772518]: warning: do not list domain example.com in BOTH mydestination and virtual_mailbox_domains

Cause

Postfix misconfiguration.

Resolution

According to the official Postfix documentation it is prohibited to list virtual mailbox domain name as mydestination domain name.

Make sure that mydestination parameter is correct in /etc/postfix/main.cf :

# grep mydestination  /etc/postfix/main.cf |grep -v "#"
mydestination = localhost.$mydomain, localhost, localhost.localdomain