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Article #2333Re: On spam email......
From: David J N Begley
Date: Fri, 29 Nov 1996 00:00
Date: Fri, 29 Nov 1996 00:00
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On 29 Nov 1996, Brendan O'Dea wrote: > >Take a look at your next spam message - they all have "Precendence:" set > >to "high" or "urgent". :-( > > Not all, but certainly some. Certainly all of the (numerous) ones that I receive. :-( > >The problem with looking for large numbers of recipients neglects the fact > >that many spam messages have a single (false) recipient address, or even > >none at all. > > Regardless of what is given in the content, all of the *real* > recipients must be supplied to the SMTP connection via. RCPT TO: and > hence may be counted. If your host isn't being used as a relay for all the messages, then it still makes the assumption that numerous users at your site are being hit at the same time (which isn't necessarily the case), otherwise there should be no need for the two MTAs to exchange all recipient addresses, even those not at this site. (Unless there's something in the SMTP spec that I've forgotten, and indicates to the receiving MTA that it doesn't need to forward all on the recipient list...) > Not suggesting that this is foolproof, just a random idea ... Still, it's yet another mechanism - and every little bit helps. :-) Cheers.. dave
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4bcb,d4d369d8b9adc43d X-Google-Attributes: gidf4bcb,public X-Google-Thread: 1090e7,d4d369d8b9adc43d X-Google-Attributes: gid1090e7,public From: David J N Begley <david@avarice.nepean.uws.edu.au> Subject: Re: On spam email...... Date: 1996/11/29 Message-ID: <Pine.LNX.3.95.961129020616.4728B-100000@avarice.nepean.uws.edu.au> X-Deja-AN: 201290027 references: <56bp4p$jjn$2@gruvel.une.edu.au> <329B1EB8.D7787C8@brisnet.org.au> <57jh40$qt@tyndall2.tyndall.com.au> <Pine.LNX.3.95.961128195523.4396H-100000@avarice.nepean.uws.edu.au> <57k517$72m@tyndall2.tyndall.com.au> content-type: TEXT/PLAIN; charset=US-ASCII organization: University of Western Sydney mime-version: 1.0 reply-to: David J N Begley <d.begley@nepean.uws.edu.au> newsgroups: aus.net.mail,aus.net.policy