Getting looping email.

by **bkiser** » Mon Nov 24, 2008 8:59 pm

One of my users kept getting the same email from another user in the same domain. Here is a copy of the source (not including attachment):

Received: from Reception ([99.172.176.214]) by matsonalarm.net
with SMTP (Code-Crafters Ability Mail Server 2.62);
Sun, 23 Nov 2008 22:50:35 -0800
From: "Janine Smith" <jsmith@ast-security.com>
To: "Craig Pollock" <cpollock@ast-security.com>,
"Randy Payne" <rpayne@ast-security.com>
Cc: <bricucci@ast-security.com>
Subject: Updates for Fire Inspection List
Date: Sun, 23 Nov 2008 22:50:40 -0800
Message-ID: <229f01c94e00$f741f030$e5c5d090$@com>
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_22A0_01C94DBD.E91EB030"
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AclMNYiFofn91PvtRgO8Yk+lC2tpuw==
Content-Language: en-us

This is a multipart message in MIME format.

------=_NextPart_000_22A0_01C94DBD.E91EB030
Content-Type: multipart/alternative;
boundary="----=_NextPart_001_22A1_01C94DBD.E91EB030"

------=_NextPart_001_22A1_01C94DBD.E91EB030
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: 7bit

Craig and Randy,

Could you help me out by reviewing the attached fire inspection list and
adding your recent accounts that include fire inspection? Thank you in
advance for your help.

Janine Smith

Advanced Security Technologies

5053 La Mart Rd., Suite 206

Riverside, CA 92507

(951) 275-5323

Fax (951) 275-5237

email: jsmith@ast-security.com

------=_NextPart_001_22A1_01C94DBD.E91EB030
Content-Type: text/html;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

<html xmlns:v=3D"urn:schemas-microsoft-com:vml" =
xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" =
xmlns=3D"http://www.w3.org/TR/REC-html40">

<head>
<meta http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<meta name=3DGenerator content=3D"Microsoft Word 12 (filtered medium)">
<style>

</style>

</head>

<body lang=3DEN-US link=3Dblue vlink=3Dpurple>

<div class=3DSection1>

Craig and Randy,<o:p></o:p>

<o:p> </o:p>

Could you help me out by reviewing the attached =
fire
inspection list and adding your recent accounts that include fire
inspection?  Thank you in advance for your help.<o:p></o:p>

<o:p> </o:p>

Janine Smith<o:p></o:p>

Advanced Security Technologies<o:p></o:p>

5053 La Mart Rd., Suite 206<o:p></o:p>

Riverside, CA   92507<o:p></o:p>

(951) 275-5323<o:p></o:p>

Fax (951) 275-5237<o:p></o:p>

email: jsmith@ast-security.com<o:p></o:p>

<o:p> </o:p>

</div>

</body>

</html>

------=_NextPart_001_22A1_01C94DBD.E91EB030--

Finally the email stopped and he got the following email:

Received: from matsonalarm.net by
with SMTP (Code-Crafters Ability Mail Server 2.62);
Mon, 24 Nov 2008 02:34:23 -0800
From: <mailserver@matsonalarm.net>
To: <bricucci@ast-security.com>,
<cpollock@ast-security.com>,
<rpayne@ast-security.com>
Subject: Mail System Error - Loop Protection Limit Reached
Date: Mon, 24 Nov 2008 02:34:23 -0800
Message-ID: <1991028796.20081124023423@DOMAIN>
MIME-Version: 1.0
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

The following mail failed to be received...

From: jsmith@ast-security.com
Subject: Updates for Fire Inspection List
Size: 4057 KB's

The mail was rejected because it exceeded the 'mail loop and infinite bounce=
protection' limit.

What could cause this?

Thank you,

Ben Kiser

by **rob** » Tue Nov 25, 2008 12:52 pm

There can be several causes of this, and it entirely depends on your setup. If you are using POP3 Retreivals at all then its possible one of the users of the mail does not exist locally and has resulted in the mail entering the outgoing mail queue. There is of course options on the domain settings and in the POP3 Retreival settings that can be enabled to detect and prevent this. The next possibility is that your users are split across multiple mail servers and so creating the possibility for hte mail to bounce back and forth between 2 or more of the servers. If it is neither of these problems then I would recommend you examine the logs to try and gain a better picture of what is going on. Of course if you would like to provide a better description of your mail server setup this may help also highlight any potential problem areas. If you want to keep any details of your setup private, you can of course switch this to mails and contact me on rob@code-crafters.com.

Getting looping email.

Getting looping email.

Re: Getting looping email.

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