I get this email, and a lot (1100x and then I stopped Postfix). This is the Postfix program at host megelinkserver.nl. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the attached returned message. The Postfix program <firstname.lastname@example.org>: mail for localhost.localdomain.nl loops back to myself Reporting-MTA: dns; mydomain.nl X-Postfix-Queue-ID: E98A31000F6E X-Postfix-Sender: rfc822; email@example.com Arrival-Date: Fri, 21 Dec 2007 18:58:24 +0100 (CET) Final-Recipient: rfc822; firstname.lastname@example.org Action: failed Status: 5.0.0 Diagnostic-Code: X-Postfix; mail for localhost.localdomain.nl loops back to myself Everytime I start Postfix again I am getting this mails again after the first mail is sent to my email address. If no mail is sent I do not get the mails, but after de first mail is sent they keep coming. Hope someone can help me. Thanks p.s. I changed my own domain to mydomain and the email address to email@example.com in the text above.