Date: Mon, 8 Apr 2002 07:38:33 -0700 (PDT) From: Chern Lee <chern@FreeBSD.org> To: Ceri Davies <setantae@submonkey.net> Cc: <doc@FreeBSD.ORG> Subject: Re: RFC: Change to "why does my mail to FreeBSD.org bounce" FAQ Message-ID: <20020408072228.F43602-100000@www.freebsdmall.com> In-Reply-To: <20020408074755.GA4830@submonkey.net>
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It's very early in the morning, so I'll try to add to this discussion as best as I can. hub.freebsd.org implements some of Postfix's stricter client checks for mail it receives. The hostname in the EHLO/HELO command must merely exist, it does not necessarily have to match the client's IP address. I've ran into on a few occasions, mailservers that have forward DNS but no reverse DNS entries. Clients/mailservers with this condition will be denied by hub.freebsd.org. hub.freebsd.org will reject: * HELO/EHLO command with bad syntax * HELO/EHLO not in FQDN form * HELO/EHLO hostname without DNS A or MX record * Client hostname is unknown (will not reverse resolve) * MAIL FROM domain without DNS A or MX record * MAIL FROM not in FQDN form Hopefully that sheds some more light :) - chern On Mon, 8 Apr 2002, Ceri Davies wrote: > On Sun, Apr 07, 2002 at 11:41:28AM -0700, Gary W. Swearingen wrote: > > Ceri Davies <setantae@submonkey.net> writes: > > > > > + <para>Some mail user agents generate bad message IDs which will > > > + not be accepted. You will need to persuade your mail user > > > + agent to generate a valid message ID or else configure your > > > + mail transfer agent to rewrite them.</para> > > > > The answer should also have: > > > > <para>In the FreeBSD.org mailing list system, the definition of "valid" > > for the message ID and other mail headers is an arbitrary definition > > which is different than those found in IETF RFCs and which is subject to > > change without notice before or after the change.</para> > > Well that's a matter of interpretation. > I'd say that using @localhost in your message ID is simply making yourself > far more likely to violate this piece of RFC2822 : > > The message identifier (msg-id) itself MUST be a globally unique > identifier for a message. The generator of the message identifier > MUST guarantee that the msg-id is unique. > > But then, as I said, that's just my interpretation. > > Ceri > > -- > get the cool shoe shine > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-doc" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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