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Exchange 2003 Messages Queued for deferred delivery

usdm
usdm asked
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Medium Priority
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Last Modified: 2013-11-15
Howdy,

Quick question:  How do I stop the "Messages Queued for deffered delivery" queue from filling up with email to bogus users in my domain?  Every one of the 2500 messages in this one queue is to ficticious name in my domain.  Some seem to be NDRs from the internet containing SPAM, and some are just straight SPAM, but all to unknown users in my domain.  I have already enabled the "Filter reciepients not in Directory" option and applied it to the Virtural server.  I was seeing tons of SMTP connectors but this seems to be fixed.  Now I am only seeing this one queue fill with email destined for unknown users in my domain.

Can anyone help me out?
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Expert of the Year 2007
Expert of the Year 2006

Commented:
If you have only just made that change, then you need to wait for the queues to flush.
If you want to flush them out by hand, then I have some techniques on my web site.
http://www.amset.info/exchange/spam-cleanup.asp

Otherwise they will take 48 hours to clear totally.

Did you put the tar pit value on as well?
http://support.microsoft.com/?kbid=842851

Simon.

Author

Commented:
Dude, thanks for the promt response.  I cleaned out the queue by hand after I applied the filter, and they started comming back.
Expert of the Year 2007
Expert of the Year 2006

Commented:
ESM is notorious for not showing the true extent of the messages that are in the queue. It can take three or four attempts before it is clear and stays clear.

Simon.

Author

Commented:
I have noticed that although I cleared out all of the messages they still reappear.  They have submit times of a few minutes ago.  Doesnt this mean that I am still being attacked?
Expert of the Year 2007
Expert of the Year 2006
Commented:
Did you restart the SMTP Virtual Server after setting the filter?

Simon.

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Author

Commented:
No.  Should I wait untill after hours to do this?  If thats it and it works, then ill buy you a burger.  Thanks for your help on this.  
Expert of the Year 2007
Expert of the Year 2006

Commented:
I will quite happily restart the service during the day. It stops email for a moment, but the users shouldn't notice.

Simon.

Author

Commented:
Simon,

Theyre still comming!  All to bogus users in my doamin, all building in the "Queue for Deferred Delivery"

-Buc
Expert of the Year 2007
Expert of the Year 2006

Commented:
Are you sure that they are new messages?

The only way to be 100% sure is to to shut off inbound email, flush the queues completely and see whether email continues to build.

As I said earlier in this question, ESM is notorious for not showing the true state of the queues during an attack of this type.

Simon.

Commented:
did you try eamiling your system administrator?

Commented:
nevermind that last...wasnt for this
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