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Exchange server giving "Delayed Delivery" message.

Posted on 2009-04-17
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Last Modified: 2012-05-06
All,

Our Exchange 2003 sp2 server is randomly giving users on Outlook the following message

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.

      example@example.com


The recipient immediately get's the email, even though the sender immediately get's a "delay notification."

Any one seen this?
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Question by:coyotejeff
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flyingsky earned 1500 total points
ID: 24170248
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by:coyotejeff
ID: 24170361
Thank you for the article.  Although the symptoms match up perfectly, this article is for Exchange 2000.  That being said I did check the settings described in that article and they all look correct.

Any other ideas?
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by:flyingsky
flyingsky earned 1500 total points
ID: 24170485
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Author Comment

by:coyotejeff
ID: 24170586
I will go through that discussion.  More information--this is happening to multiple domians with great frequency.  I don't think it's anything on the recipients side.  I have also verified that our IP is not blacklisted.  We have multiple offices in the org over a WAN, and none of the other Exchange servers are having this issue.  We do use Postini as a smarthost for outgoing mail in all sites.

Thanks.
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Author Comment

by:coyotejeff
ID: 24171975
More information.  Even when removing the smart host, I am still getting the Delayed Delivery message.
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Author Comment

by:coyotejeff
ID: 24220530
So far, it's looking like there was a large amount of network traffic due to viral activity at the site.  The network connection for outgoing mail was crawling.  After cleaning up the network a bit, mail flow seems to have continued without the delay messages.
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