From owner-freebsd-chat Tue Feb 26 1:38: 8 2002 Delivered-To: freebsd-chat@freebsd.org Received: from durendal.skynet.be (durendal.skynet.be [195.238.3.128]) by hub.freebsd.org (Postfix) with ESMTP id 1E71A37B405 for ; Tue, 26 Feb 2002 01:38:04 -0800 (PST) Received: from [10.0.1.18] (ip-27.shub-internet.org [194.78.144.27] (may be forged)) by durendal.skynet.be (8.11.6/8.11.6/Skynet-OUT-2.16) with ESMTP id g1Q9beg27345; Tue, 26 Feb 2002 10:37:41 +0100 (MET) (envelope-from ) Mime-Version: 1.0 X-Sender: bs663385@pop.skynet.be Message-Id: In-Reply-To: <20020225174520.L47910@over-yonder.net> References: <3C7AC400.B8F3E9FC@mindspring.com> <20020225174520.L47910@over-yonder.net> X-Grok: +++ath X-WebTV-Stationery: Standard; BGColor=black; TextColor=black Reply-By: Wed, 1 Jan 1984 12:34:56 +0100 X-Message-Flag: Outlook : A program to spread viri via e-mail. Try Eudora (http://www.eudora.com/), mutt (http://www.mutt.org/), or pine (http://www.washington.edu/pine/). But please, get something other than Outlook. Date: Tue, 26 Feb 2002 10:09:49 +0100 To: "Matthew D. Fuller" , Terry Lambert From: Brad Knowles Subject: Re: blocked mail Cc: "Jeremy C. Reed" , FreeBSD Chat Content-Type: text/plain; charset="us-ascii" ; format="flowed" Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org At 5:45 PM -0600 2002/02/25, Matthew D. Fuller wrote: >> In addition, the MX requirement is often that the sending >> host be in the MX list for the "MAIL FROM " >> domain part, or the mail will be refused as a suspicious >> relay. > > That can't be right. Incoming MX servers, and outgoing sendmail servers, > are often different. Remember, the check is done at the domain level, if at all. > Of course, it IS a SHOULD, not a MUST, but still... > > RFC821 doesn't seem to have anything to say about MX records and their > utilization, it just defines the SMTP standard itself. I checked RFC 1123, and while there are a number of references to MX records, etc... I couldn't find anything about falling back to pure IP addresses if there are no MX records. It makes sense that this would come from RFC 974, however. -- Brad Knowles, Do you hate Microsoft? Do you hate Outlook? Then visit the Anti-Outlook page at 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