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Exchange Mailserver Spam

Posted on 2010-09-15
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Medium Priority
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Last Modified: 2012-06-27
I need assistance in analyzing an email header. Someone seems to be passing Spam through a customers Exchange server, but can't see how.

Header information below. The IP address of: 70.89.4.109 is the  Exchange Mailserver. The IP of the intruder appears to be: 64.186.141.117

Return-Path: bristollotto03redacted@yahoo.co.jp
Received: from imta19.westchester.pa.mail.comcast.net (LHLO
imta19.westchester.pa.mail.comcast.net) (76.96.62.15) by
sz0165.ev.mail.comcast.net with LMTP; Tue, 14 Sep 2010 12:12:39 +0000 (UTC)
Received: from mailserver2.Inst-Child-Lit.Com ([70.89.4.109])
by imta19.westchester.pa.mail.comcast.net with comcast
id 6cCe1f0202M7bz20KcCefL; Tue, 14 Sep 2010 12:12:40 +0000
X-CAA-SPAM: N00001
X-Authority-Analysis: v=1.1 cv=xQtC0Syy8SjLhPQcxulnFUoy7eUGsAEUo+3gGakOX9w=
c=1 sm=1 p=G0y4NAOPbeQA:10 p=H7zlAlwjME0A:10 p=FlyXWrF0noTvJhcw3_cA:9
a=Dyoqhi_TatcA:10 a=8EU9Q7FnrCoA:10 a=Cfj4BQAnxiAA:10
a=4UKdybQ46eJVya8Ku_wA:7 a=l9BT-LX5JHtfJXMJ0NHU38ZYah4A:4 a=Ft8UYL4EG9YA:10
a=heEvz1zlalEA:10 a=XjuyCbnmBgpgFB-i:21 a=jTmyPk-QPQLX5MgK:21
a=L5inqJBnP8MMvF9QzrwThA==:117
Received: from User ([64.186.141.117]) by mailserver2.Inst-Child-Lit.Com with Microsoft SMTPSVC(6.0.3790.4675);
Mon, 13 Sep 2010 18:42:03 -0400
Reply-To: <bristolsweepstakesredacted@yahoo.co.jp>
From: "BRISTOL LOTTERY"<bristollotto03redacted@yahoo.co.jp>
Subject: AWARD NOTIFICATION.
0
Comment
Question by:frankv_43
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6 Comments
 
LVL 8

Expert Comment

by:Mkris9
ID: 33683070
have you checked your sever for relay settings ? may be its an open relay ?
0
 

Author Comment

by:frankv_43
ID: 33683151
Yes, the Exchange box has been checked and is NOT open relay.  
0
 
LVL 8

Expert Comment

by:rr1968
ID: 33683454
64.186.141.117 resolves to farm1.myforexvps.com
Also this server is not open relay or at least port 25 is blocked on their side.
Why can't you add this ip in your block list?

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Accepted Solution

by:
frankv_43 earned 0 total points
ID: 33683563
We did all the obvious stuff, including blocking 64.186.141.117.

Thanks
0
 
LVL 2

Expert Comment

by:joe_h
ID: 33683686
It would really help to see the corresponding log entries from the affected Exchange server. It seems to me that the Exchange box actually is misconfigured as an open relay.
0
 
LVL 6

Expert Comment

by:collins23
ID: 33684069
where is the email destined ?
0

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