Date: Fri, 25 Jul 1997 13:22:50 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: terry@lambert.org, chat@freebsd.org Subject: Re: (over)zealous mail bouncing Message-ID: <199707252022.NAA20020@phaeton.artisoft.com> In-Reply-To: <199707250558.PAA20387@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Jul 25, 97 03:28:46 pm
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> > > > I have to warn you that several mail server products of which I'm > > > > aware actualy verify via getpeername/gethostbyaddr (RARP), and > > > > will reject your host anyway. > > > > > > RARP? Or was that just a belch in mid-sentence :-)? > > > > Reverse Address Resoloution Protocol. When someone connects to me, > > I can always geet the IP address they are connecting from. Using > > RARP, I can turn the address into a machine name, and compare it > > with what you tell me on the "HELO" and "MAIL FROM:" lines. > > Oh Terry. You've never booted a machine diskless in your life, have you? > > RARP is reverse-ARP. It's "This is my media address; WTF am I?", rather > than "WTF owns this IP address?" > > Seeing as RARP requests are _broadcast_, I can't exactly see them > being used for anything even vaguely approaching what you're talking > about. I've been brain frating between "reverse address lookup" and "reverse address resoloution". Sorry. The algorithmic content for SPAM filtering remains the same, with this correction. Sorry for the duration of the brain-fart -- once I had the "reverse address" part of the acronym wired, I didn't bother to keep the rest of it in short term memory. Regards, Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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