From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/36362 Path: main.gmane.org!not-for-mail From: Stainless Steel Rat Newsgroups: gmane.emacs.gnus.general Subject: Re: Sender header? Date: Thu, 24 May 2001 17:20:36 -0400 Organization: The Happy Fun Ball Brigade Message-ID: <01May24.172056edt.115272@gateway.intersys.com> References: <01May23.141128edt.115245@gateway.intersys.com> <01May24.115917edt.115250@gateway.intersys.com> <01May24.143521edt.115214@gateway.intersys.com> <01May24.153439edt.115213@gateway.intersys.com> <01May24.163305edt.115259@gateway.intersys.com> NNTP-Posting-Host: coloc-standby.netfonds.no Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1035171960 8200 80.91.224.250 (21 Oct 2002 03:46:00 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Mon, 21 Oct 2002 03:46:00 +0000 (UTC) Return-Path: Original-Received: (qmail 29160 invoked by alias); 24 May 2001 21:21:36 -0000 Original-Received: (qmail 29155 invoked from network); 24 May 2001 21:21:35 -0000 Original-Received: from gateway.intersys.com (HELO intersys.com) (198.133.74.253) by gnus.org with SMTP; 24 May 2001 21:21:35 -0000 Original-Received: by gateway.intersys.com id <115272>; Thu, 24 May 2001 17:20:56 -0400 Original-To: "(ding)" X-Attribution: Rat In-Reply-To: User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Cuyahoga Valley) Original-Lines: 43 Xref: main.gmane.org gmane.emacs.gnus.general:36362 X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:36362 * prj@po.cwru.edu (Paul Jarc) on Thu, 24 May 2001 | It is not the nature of DNS (or anything else) that the mail exchanger | for domain.com must also accept mail for any other domain, such as | random-sending-host.domain.com. Actually, it should. If it does not then steps should be taken to prevent "random-sending-host.domain.com" from sending mail or to masquerade it. | I didn't ask you to restate the requirement. I asked where it was. | RFC 2822 does not use the word "canonical" in connection with Sender. | I haven't been able to find the requirement. Sender is of type mailbox. It must be possible to deliver mail to an addr-spec for it to be a mailbox. Canonical means that at least some effort has been made to ensure the accuracy of the thing; it does not need to be defined by RFC 2822 any more than the word "obsolete". | It isn't a canonical address if it isn't an address at all. But if login @ fqdn is not an address at all then something in the system is not configured correctly. [...] | No, it isn't. You're demanding that Sender identify not just the | person who sent the message, but also the host it was sent from. So I | ask, what will break if your additional requirement isn't met? And I answered. [...] | You still have Received fields. Sender is unreliable anyway, since | it's under the control of a possible malicious person. So is From, To, and just about everything else. Your point? | They are necessary, but not sufficient, to make your requirement | work. Actually, proper DNS records are all that is required to make it work. -- Rat \ Do not taunt Happy Fun Ball. Minion of Nathan - Nathan says Hi! \ PGP Key: at a key server near you! \