We have been running 2 Exchange 2010 servers for about 1 year. Very few problems. However, I had a user today that complained of this error: Delivery is delayed to these recipients or groups:...
I sent a test message to the intended recipient and he got the message. Then I had the user send a test msg and it worked too. So I thought the problem was solved. However, later we got another "delayed error" from a different msg sent to this recipient. So I used message tracking to troubleshoot the problem. Below is what I found on the delayed message. What might be going on and what else can I do to troubleshoot this issue? thanks
Submitted
5/8/2013 10:54 AM POLY-E10-1.corp.domain.com
The message was submitted to poly-e10-2.corp.domain.com. Pending
5/8/2013 10:54 AM poly-e10-2.corp.domain.com
The message has been queued on server 'poly-e10-2.corp.domain.com' since 5/8/2013 10:54:59 AM (UTC-06:00) Central Time (US & Canada). The last attempt to send the message was at 5/8/2013 3:11:33 PM (UTC-06:00) Central Time (US & Canada) and generated the error '400 4.4.7 Message delayed'.
5/8/2013 3:22 PM poly-e10-2.corp.domain.com
Message delivery is taking longer than expected. There may be system delays. For more information, contact your helpdesk.