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Re: Who Is This Addressed To & How Do I Stop This Spam?

2004-02-02 23:14:27
On Tue, 2004-02-03 at 13:41, Professional Software Engineering wrote:
At 13:02 2004-02-03 +1100, Marvin Pierce wrote:
Shown below is a header from spam that I have started getting. It does
not have my email address in the To:Cc:Bcc fields.

Bcc: isn't a field which should be present on received email.  The MSA 
supports it for defining recipients, but removes the header when the 
message is actually processed.

How am I getting it and more importantly, how do I stop it?

It's being BCC'd to you.  If your ISP normally inserts their own 
X-Envelope-To: header or somesuch, the reason you're not seeing it is 
because MTAs tend not to insert that when there are multiple local recipients.

Return-path:  <Kiera_Gorby(_at_)telex(_dot_)com>

Is this consistent across the spams?

Envelope-to:  mpierce(_at_)localhost
Received:  from [127.0.0.1] (helo=localhost) by libranet with esmtp
(Exim 4.30) id 1AnchC-0003m8-8X for mpierce(_at_)localhost; Mon, 02 Feb 2004
22:56:54 +1100
Received:  from mail.optusnet.com.au [211.29.132.250] by localhost with
IMAP (fetchmail-6.2.4) for mpierce(_at_)localhost (single-drop); Mon, 02 Feb
2004 22:56:54 +1100 (EST)

You're _fetching_ the message from your ISP mailbox.  This would be 
worthwhile to state in your request for assistance.  Where is procmail 
running - there or on your local host?

Procmail is running on my local host.

I run Exim4 as my mta with fetchmail, procmail and spamassassin, razor
and dccproc.


Received:  from cpe-66-27-193-247.socal.rr.com
(cpe-66-27-193-247.socal.rr.com [66.27.193.247]) by
mail012.syd.optusnet.com.au (8.11.6p2/8.11.6) with SMTP id i12BpvS04539;
Mon, 2 Feb 2004 22:51:59 +1100
Received:  from 136.106.206.71 by web237.mail.yahoo.com; Mon, 02 Feb
2004 10:48:53 -0100

This lower Received: header is bogus, and of course, the only reason yahoo 
should be involved is if it's coming from a yahoo or related ISP.  The 
Received header above this is the actual origin - so I'd start by 
forwarding the entire message to abuse(_at_)socal(_dot_)rr(_dot_)com (or 
@rr.com).

Will do!


Content-Type:  multipart/alternative; boundary="--0670296902789068"
X-CS-IP:  148.176.192.110

Is this common to them all, or is this something your ISP inserts?  This 
doesn't correlate to any of the addresses shown in the received headers.

No, this doesn't seem to be common to all of them. 



You could help yourself by identifying which characteristics of the 
multiple spams correlate to one another - the IP address, the supposed 
sender address, etc.  Whichever characteristics are consistent, use those 
to filter on.

There doesn't seem to be a common thread except that they are being
Bcc'd to me. 


Obviously, someone is running SpamAssassin (you or your ISP), so perhaps 
you could submit the messages to the SA-LEARN facility.  That'd be a 
SpamAssassin specific thing, so check the SA docs.

Have rerun sa-learn for Spassassin. 

I have 3 email addresses. Is there a way to create a procmail receipe
that will send all Bcc emails to a $MAILDIR/spam/ for checking?


---
  Sean B. Straw / Professional Software Engineering

  Procmail disclaimer: <http://www.professional.org/procmail/disclaimer.html>
  Please DO NOT carbon me on list replies.  I'll get my copy from the list.


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