We use Exchange 2003 server. Lately, a user first received a set of error messages, similar to the one below, when sending to some external email recipients:
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.
He reported this to me (he was able to email me). Later, he sent me error messages, similar to the one below, for the same emails he had earlier complained about:
Subject: Undeliverable: Delivery Status Notification (Failure)
Your message did not reach some or all of the intended recipients.
Subject: Original email message subject
The following recipient(s) cannot be reached:
Recipient Name on 5/21/2009 8:53 PM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
What could be the problem, and how can I rectify it please? Thanks for all responses in advance. The user has Office 2007 and Vista. Only one user has reported this problem.