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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Spammer Bust
On Fri, Sep 05, 1997 at 04:35:17PM -0400, Jeremy Elson wrote: > More recently, though, something much more insidious started to happen: > spammers have started forging Received: lines in the headers to misdirect > attempts at tracing the source of the mail! Here's one beautiful example > of a spam header I received (my mailhost here was blaze.cs.jhu.edu): > > From: [email protected] > Received: from fs.IConNet.NET > by blaze.cs.jhu.edu with ESMTP; Wed, 9 Apr 1997 07:54:13 GMT > Sender: [email protected] > Received: from 199.173.160.250 (ip19.new-haven.ct.pub-ip.psi.net > [38.11.102.19]) by fs.IConNet.NET (8.8.5/8.8.5) with SMTP id DAA12207; > Wed, 9 Apr 1997 03:54:27 -0400 (EDT) > Received: from mailhost.bethere.net(alt2.bethere.net(214.756.86.9)) by > bethere.net (8.8.5/8.6.5) with SMTP id GAA04732 for > <[email protected]>; Wed, 09 Apr 1997 02:52:20 -0600 (EST) ^^^^^^^^^^^ > To: [email protected] > Message-ID: <[email protected]> [ "how did it get there?" ] > The answer, of course, is that the mail really originated from a PSInet > dialup, using IConNet.NET as a spam relay; the bottom Received: line is an > utter forgery, presuambly added by the spam-mailing software. In fact, > it's not even a very good forgery, because the supposed IP address of > alt2.bethere.net is invalid (the 2nd octet is 756). This is a known spamming program; the highlighted mistake would probably work _exceptionally_ well in your procmail file. :-) Cheers, -- jra -- Jay R. Ashworth [email protected] Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "People propose, science studies, technology Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790 7592
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