[Declude.JunkMail] How did this Spammer get through?

2003-03-12 Thread Brian Cunningham
I've got several held emails from a spammer trying to use our system for
relay.

I've got the box locked down to only accept relay from authenticated
users, but somehow this guy got through.

Luckily, I've got hijack on the box, which has blocked all of his
emails.

Here's an example of the email he's trying to relay through:

Received: from 208.253.112.160 [169.207.38.237] by richmond.com
  (SMTPD32-7.07) id A450F9200BE; Wed, 12 Mar 2003 18:35:44 -0500
Received: from 0e.ygr0.net ([143.95.123.108]) by 208.253.112.160 with
SMTP; Wed, 12 Mar 2003 22:30:43 -0100
Message-ID: [EMAIL PROTECTED]
From: Mervin Crow [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED], [EMAIL PROTECTED]
Subject: re: Increase Your Gas Mileage by up to 27% ohvs eex
Date: Wed, 12 Mar 03 22:30:43 GMT
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: The Bat! (v1.52f) Business
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary=15978B3_057.85AE_.850_

This is a multi-part message in MIME format.

--15978B3_057.85AE_.850_
Content-Type: text/html
Content-Transfer-Encoding: quoted-printable

htmlbodyPaul athwartship,a href=3Dhttp://[EMAIL PROTECTED]
averpro.com
img src=3Dhttp://[EMAIL PROTECTED]/the.jpg width=3D536=
 height=3D505
/asalute beacon stumpweapon gapbr%RA=
NDOM_WORDhum implantation party dish/body/html
--15978B3_057.85AE_.850_--


How is he successfully getting through?

Also, how can I block him from coming through again?

Thanks.

Brian













-Original Message-
From: R. Scott Perry [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, March 12, 2003 6:18 PM
To: [EMAIL PROTECTED]
Subject: Re: [Declude.JunkMail] HELO contains



SOO..  My question is this.. Could I create a wordfilter rule that goes

like HELO 10 CONTAINS imail.fament.com
or will that shoot myself in the foot for some reason ?

That will work fine, just so long as you don't have any other
mailservers 
that identify themselves as imail.fament.com.  If your IMail server is

the only one that does, the filter will work fine.

If it really is the HELO string then I don't see this as a problem 
since my understanding is that my mail server do NOT connect to itself 
and should then never send the helo imail.fament.com to itself ?!

Correct.  There might be odd cases where the IMail server would connect
to 
itself, but if that happens, you've got another problem on your hands
(as 
it would cause a mail loop).
 -Scott

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Re: [Declude.JunkMail] How did this Spammer get through?

2003-03-12 Thread R. Scott Perry

Here's an example of the email he's trying to relay through:
The key information isn't in the headers in this case -- it's in the IMail 
SMTP log file.  Most importantly are the RCPT TO: lines, which will show 
who the E-mail was actually addressed to, and whether or not some hack was 
used to relay the E-mail.  If you post the IMail SMTP log file entries, I 
should be able to let you know what is going on.
 -Scott

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Re: [Declude.JunkMail] How did this Spammer get through?

2003-03-12 Thread Brian Cunningham
Here you go:

03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] HELO 208.253.112.160
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] MAIL FROM: [EMAIL PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] RCPT TO: [EMAIL PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] RCPT TO: [EMAIL PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] ERR richmond.com invalid user [EMAIL 
PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] RCPT TO: [EMAIL PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] ERR richmond.com invalid user [EMAIL 
PROTECTED]
03:12 18:35 SMTPD(0F9200BE) [169.207.38.237] d:\IMail\spool\Dc4500f9200bec554.SMD 1114

So is he authenticating as a real user?

b



-- Original Message --
From: R. Scott Perry [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Date:  Wed, 12 Mar 2003 19:11:04 -0500


Here's an example of the email he's trying to relay through:

The key information isn't in the headers in this case -- it's in the IMail 
SMTP log file.  Most importantly are the RCPT TO: lines, which will show 
who the E-mail was actually addressed to, and whether or not some hack was 
used to relay the E-mail.  If you post the IMail SMTP log file entries, I 
should be able to let you know what is going on.
  -Scott

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Re: [Declude.JunkMail] How did this Spammer get through?

2003-03-12 Thread Brian Cunningham
What's strange is that the only thing consistent around all of the spam emails is the 
IP address 169.207.38.237, which is listed with SpamCop.

Should declude pick that up?  I've got spamcop listed as an automatic hold, but 
somehow he keeps getting through.

Thanks.

b


-- Original Message --
From: R. Scott Perry [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Date:  Wed, 12 Mar 2003 19:11:04 -0500


Here's an example of the email he's trying to relay through:

The key information isn't in the headers in this case -- it's in the IMail 
SMTP log file.  Most importantly are the RCPT TO: lines, which will show 
who the E-mail was actually addressed to, and whether or not some hack was 
used to relay the E-mail.  If you post the IMail SMTP log file entries, I 
should be able to let you know what is going on.
  -Scott

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