Mailman issue 

I had the below issue, which was solved by:

  1. postalias /etc/aliases
  2. /etc/init.d/postfix restart

———- Forwarded message ———-
From: Mail Delivery Subsystem
Date: Sat, Nov 8, 2008 at 5:18 PM
Subject: Delivery Status Notification (Failure)

This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:


Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 5.1.1 : Recipient address rejected: User unknown in local recipient table (state 14). (More …)