Date: Thu, 30 Nov 2000 16:44:42 -0600 (CST) From: David Talkington <dtalk@prairienet.org> Cc: questions@FreeBSD.ORG Subject: Re: Sendmail rulesets. Message-ID: <Pine.LNX.4.21.0011301624100.664-100000@sherman.spotnet.org> In-Reply-To: <14886.53936.218132.518054@guru.mired.org>
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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. Periodic problems with reverse lookups are understandable, cuz administrators are always overworked. Usually, a note to them will take care of it. That said, if my ISP had this problem and flatly refused to bother to fix it, I wouldn't call it a shame; I'd call it a breach of contract and take my business elsewhere -- though I recognize that in some areas, that may not be an option. There are many reasons that reverse lookup must work. Downloading 128-bit encryption packages in the US used to mean authentication by IP, and that required a valid reverse lookup; ssh will frequently balk if it can't do a reverse lookup on the client; hell, even some of the educational servers around here reject finger requests from IPs that don't resolve both ways. That's part of basic internet connectivity, IMHO. I'll shut up now. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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