jeffatrackaid - 2:31 am on Mar 10, 2009 (gmt 0)

If you email is hosted on a different server than your domain, you have to make sure your web server is not treating the domain as local. This is a common problem with hosting automation tools such as Plesk, cPanel, or Ensim.

If you are using a standard linux distribution, then you need to update the mailer tables to tell your web server to relay the email to your mail server.