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Emails bounced back from recipient

Posted on 2013-01-17
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Last Modified: 2013-01-17
SBS 2011 with Exchange 2010 and Outlook 2007/2010 clients. Out of blue users are getting emails kicked back to them from certain domains. The text below comes with the kick back.

Reporting-MTA: dns;XXXSERVER.xxxxninst.local
Received-From-MTA: dns;xxxxninst.local
Arrival-Date: Wed, 16 Jan 2013 23:59:36 +0000

Final-Recipient: rfc822;XXXXXX@ML.COM
Action: delayed
Status: 4.4.7
Diagnostic-Code: smtp;400 4.4.7 Message delayed
Will-Retry-Until: Fri, 18 Jan 2013 16:59:36 -0700
X-Display-Name:XXXXXX@ML.COM

Can anyone point me to log files or a place to start looking at this?  THANK YOU!!!!!!
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Question by:dgrenda
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6 Comments
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 38787513
There could be a number of reasons for the delay,

-greylisting
-server not responding
-incorrect email addres
-You blacklisted somewhere (some servers then use greylisting for your emails)

You could check if the remote server is responding (ping, telnet to port 25), check wether the are greylisting and check if you're not blacklisted (http://mxtoolbox.com/blacklists.aspx)
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Author Comment

by:dgrenda
ID: 38787750
Thank you!  Not blacklisted.

Can you tell me where to find the Exchange logs that would have information on why the email is returned?
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LVL 35

Accepted Solution

by:
Ernie Beek earned 2000 total points
ID: 38787839
It could be you first have to turn on the message tracking. Have a look at:

http://www.redline-software.com/eng/support/docs/iam/trouble_1_mammes.php
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Author Comment

by:dgrenda
ID: 38787999
VERY GOOD input, Thank you I will get back to you
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Author Closing Comment

by:dgrenda
ID: 38788994
It was one of the WAN IP addresses assigned to the site was black listed. I changed the IP and it fixed it.

THanks for your help
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LVL 35

Expert Comment

by:Ernie Beek
ID: 38789245
My pleasure, glad I could help.
Thx 4 the points :)
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