From our Exchange server, we can not send to a particular domain. Everyone else can and we can if we send from our yahoo/gmail accounts. This is the message we get:
Subject: Delivery Status Notification (Delay)
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.
Reporting-MTA: dns;XXXXXXXXXXt.com Final-Recipient: rfc822;jvanderbrink@XXXXXXXX.com Action: delayed Status: 4.4.7 Will-Retry-Until: Sun, 4 Dec 2011 09:43:04 -0500 X-Display-Name: jvanderbrink@XXXXXXXXXXXX.com
Then it never goes.