Date: Thu, 30 Nov 2000 15:44:11 +0100 From: Christoph Sold <so@server.i-clue.de> To: Will Mitayai Keeso Rowe <mit@mitayai.net> Cc: Christoph Sold <so@server.ms-agentur.de>, questions@FreeBSD.ORG Subject: Re: Sendmail rulesets. Message-ID: <3A2667BB.9020208@i-clue.de> References: <NEBBIEGPMLMKDBMMICFNMEMPDIAA.mit@mitayai.net>
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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. 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
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