Date: Tue, 26 Feb 2002 23:17:48 +0100 From: Brad Knowles <brad.knowles@skynet.be> To: Terry Lambert <tlambert2@mindspring.com>, "Crist J. Clark" <cjc@FreeBSD.ORG> Cc: "Matthew D. Fuller" <fullermd@over-yonder.net>, "Jeremy C. Reed" <reed@reedmedia.net>, FreeBSD Chat <chat@FreeBSD.ORG> Subject: Re: blocked mail Message-ID: <p05101412b8a1b7f575cb@[10.0.1.18]> In-Reply-To: <3C7B5076.435E3B8@mindspring.com> References: <Pine.LNX.4.43.0202251413410.25937-100000@pilchuck.reedmedia.net> <3C7AC400.B8F3E9FC@mindspring.com> <20020225174520.L47910@over-yonder.net> <3C7AEC08.223E422C@mindspring.com> <20020225224754.G52727@blossom.cjclark.org> <3C7B5076.435E3B8@mindspring.com>
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At 1:08 AM -0800 2002/02/26, Terry Lambert wrote: > I can't remember the "README" and M4 source code right now, > but there is an option to permit a MAIL FROM check to make > sure that the EHLO host (peername) is an MX for the from > domain. Looking at the macros for sendmail 8.12.2, the only ones I find are: FallbackMXhost TryNullMXList # if we are the best MX host for a site, try it # directly instead of config err _RELAY_MX_SERVED_ # do "we" ($=w) act as backup MX server for the # destination domain? _BESTMX_IS_LOCAL_ > Basically, if it can be checked, you should assume that > someone is checking it. I don't see anything anywhere of the sort that you are talking about. Certainly, you can write your own rules to do this sort of thing, as I have done in the past. But I don't see anything here to make this automatic, or even make the life easier of the admin who is creating the config. > Weird-ass DNS setups that break the ability to check are > expected to break, even if they are called out as legal > in a proposed standard. In this modern world of spam, this statement is certainly true. Doing something like this would certainly slow down the accepting of mail from remote sites, but it would help you avoid effluent from a certain category of sources. -- Brad Knowles, <brad.knowles@skynet.be> Do you hate Microsoft? Do you hate Outlook? Then visit the Anti-Outlook page at <http://www.rodos.net/outlook/>; and see how much fun you can have. "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -Benjamin Franklin, Historical Review of Pennsylvania. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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