Date: Thu, 30 Nov 2000 16:20:32 -0600 (CST) From: Mike Meyer <mwm@mired.org> To: Christoph Sold <so@server.i-clue.de> Cc: questions@freebsd.org Subject: Re: Sendmail rulesets. Message-ID: <14886.53936.218132.518054@guru.mired.org> In-Reply-To: <96229087@toto.iv>
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Christoph Sold <so@server.i-clue.de> types: > You are right. It is the MX IP that must resolve both ways. Shame there > are some providers who don't worry about reverse lookup. And there are some of us who can't control the reverse lookup. Sure, in an ideal world everyone would have the reverse lookup set up properly. But in that ideal world, we'd all have T3's to our house and a class C network of our own. In the real world, some of us have to live with cable modems and one IP address - and dynamic dns to map a name to that, meaning we can't control the reverse lookup. <mike > HTH > - -Christoph Sold > > Will Mitayai Keeso Rowe wrote: > > > That does not seem right... > > > > Not every company even HAS an ip address for their domian, especially when > > they are just using it for mail. after all, for mail, all you need is an MX > > record.... > > > > > > > > -----Original Message----- > > From: Christoph Sold [mailto:so@server.i-clue.de] > > Sent: Wednesday, November 29, 2000 1:03 PM > > To: Will Mitayai Keeso Rowe > > Cc: questions@FreeBSD.ORG > > Subject: Re: Sendmail rulesets. > > > > > > Will Mitayai Keeso Rowe wrote: > > > >> Hi, folks... > >> > >> i'm running 4.2-STABLE with an updated sendmail.cf file, and i'm getting > >> some strange things going on... > >> > >> here's a message i get a lot: > >> > >> Nov 26 12:44:50 castle sendmail[14916]: eAQHhTu14916: ruleset=check_mail, > >> arg1=<paulf@canadianalliance.ca>, relay=tomts1.bellnexxia.net > >> [209.226.175.139], reject=451 4.1.8 <paulf@canadianalliance.ca>... Domain > >> of sender address paulf@canadianalliance.ca does not resolve > >> Nov 26 12:44:50 castle sendmail[14916]: eAQHhTu14916: > >> from=<paulf@canadianalliance.ca>, size=10963, class=0, nrcpts=0, > >> proto=ESMTP, daemon=MTA, relay=tomts1.bellnexxia.net [209.226.175.139] > >> > >> What exactly can it not resolve? I resolve canadianalliance.ca just fine > > > > on > > > >> that machine... > > > > > > Both forward and reverse name mapping must resolve. That is, if a.b.com > > resolves to 1.2.3.4, 4.3.2.1.in-addr.arpa must resolve to a.b.com. > > > > Just check this is the case using either dig or nslookup for the host(s) > > in question. > > > > HTH > > -Christoph Sold > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > -- Mike Meyer http://www.mired.org/home/mwm/ Independent WWW/Unix/FreeBSD consultant, email for rates. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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