When ever some of the users try to send to certain domain's they first of all get a message back saying that the message has been delayed and finally it fails. Below is an example of one of the messages that comes back. The message says below that the reporting MTA is exchange1 which is the NetBIOS name of our Exchange server, also I have changed the recipients domain to domainx for privacy. Does anyone have an idea why this is happening ? Many thanks in advance "This is an automatically generated Delivery Status Notification. THIS IS A WARNING MESSAGE ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. Delivery to the following recipients has been delayed. adam@domainx.com mat@domainx.com mike@domainx.com Reporting-MTA: dns;exchange1.mydomain.com Final-Recipient: rfc822;adam@domainx.com Action: delayed Status: 4.4.7 Will-Retry-Until: Wed, 15 Mar 2006 13:59:40 +0000 X-Display-Name: Adam Ferrier Final-Recipient: rfc822;mat@domainx.com Action: delayed Status: 4.4.7 Will-Retry-Until: Wed, 15 Mar 2006 13:59:40 +0000 X-Display-Name: Mat Baxter Final-Recipient: rfc822;mike@domainx.com Action: delayed Status: 4.4.7 Will-Retry-Until: Wed, 15 Mar 2006 13:59:40 +0000 X-Display-Name: Mike Wilson
