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Mail delivery failed: returning message to sender (Only One User)

Posted on 2014-02-10
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Last Modified: 2014-04-15
Hi,

I am facing really strange issue from last two days but fail to resolve the issue.
My hosted exchange 2010 is working absolute fine. I configured new domain (previously using SBS2003 with Postini service), all users are working fine no spam emails, NDR etc (We are using Forefornt Protection 2010 for Exchange Server, All engines are updated) but only one user/email address continuously receiving spam emails. Please review the attach pictures of Message Tracking, Email and Header.

I really don't know what is the issue, users continuously receiving below emails after 2 or 3 minutes, i am just wondering why my exchange server allow those email address. How i can stop these emails.
Note: Old SBS server is shutdown. Postini service is already disabled.
Please help me.

Email that client received.message header and exchange tracking
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Question by:Geforce
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4 Comments
 
LVL 9

Expert Comment

by:David Carr
ID: 39848419
Look in the queues of your Client Access Servers for the messages and delete them if you see them.
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Author Comment

by:Geforce
ID: 39849168
Thanks David for the reply but queues of my CAS server is empty, nothing stuck
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Accepted Solution

by:
Geforce earned 0 total points
ID: 39993415
Issue has been resolved. Client old exchange server is compromised and send lots of spam, After shutdown old exchange server. everything is fine.
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Author Closing Comment

by:Geforce
ID: 40001105
Old server is compromise, we shutdown that server and everything is fine.
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