[91651] in North American Network Operators' Group
Re: ISP wants to stop outgoing web based spam
daemon@ATHENA.MIT.EDU (Hank Nussbacher)
Wed Aug 9 16:05:35 2006
Date: Wed, 9 Aug 2006 23:00:32 +0300 (IDT)
From: Hank Nussbacher <hank@efes.iucc.ac.il>
To: Ken Simpson <ksimpson@mailchannels.com>
Cc: nanog@merit.edu
In-Reply-To: <20060809164352.GB6362@mailchannels.com>
Errors-To: owner-nanog@merit.edu
On Wed, 9 Aug 2006, Ken Simpson wrote:
Typical SMTP headers of http based spam:
> Received: from pmx2.montclair.edu (smtp-in.montclair.edu [130.68.1.65])
> by broadway.montclair.edu
> (iPlanet Messaging Server 5.2 HotFix 1.21 (built Sep 8 2003))
> with ESMTP id <0J3Q0067VUMZAF@broadway.montclair.edu> for
> x; Wed, 09 Aug 2006 14:42:35 -0400 (EDT)
> Received: from pmx2.montclair.edu (localhost [127.0.0.1])
> by localhost (Postfix) with SMTP id 032883F01 for
> <x>;
> Wed, 09 Aug 2006 14:42:35 -0400 (EDT)
> Received: from tw4.telgua.com.gt (tw3.telgua.com.gt [216.230.128.5])
> by pmx2.montclair.edu (Postfix) with ESMTP id 8F6993F03 for
> <x>; Wed, 09 Aug 2006 14:42:35 -0400 (EDT)
> Received: from intelnet.net.gt (unknown [10.160.3.1])
> by tw4.telgua.com.gt (Tumbleweed MailGate) with ESMTP id
> 72D1748A5C673; Wed,
> 09 Aug 2006 13:42:51 -0500 (CDT)
> Received: from [10.160.3.30] (Forwarded-For: [xx.56.145.19])
> by messaging.telgua.com.gt (mshttpd); Wed, 09 Aug 2006 12:39:46 -0700
The key here is the bottom Received with the mshttpd. Only once it hits
telgua.com.pt (this is just an example of the dozens I see per day), does
it get converted into smtp, but the xx.56.145.19 IP is the one that gets
listed in spam BLs.
Basically, the state of blocking outgoing spam hasn't progressed in the
past 4 years. Bummer.
Hank Nussbacher
http://www.interall.co.il
>
>> I thought it was pretty clear that he was talking about e-mail spam
>> submitted using HTTP to webmail services like hotmail, yahoo and gmail:
>
> I guess I'm still a little confused about the poster's original
> request. It sounds like he is interested in stopping his own users
> from spamming via web-based email services such as Gmail and Hotmail,
> or via insecure forms. That can be accomplished hypothetically by
> filtering HTTP requests and looking for spam in POSTs; although with
> the proliferation os AJAX-style interfaces in these services, figuring
> out which POSTs refer to a message submission is far more difficult
> than it was in the good old Web 1.0 days.
>
> Regards,
> Ken
>
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