nanog mailing list archives
Re: Spamhaus...
From: Robert Bonomi <bonomi () mail r-bonomi com>
Date: Sat, 20 Feb 2010 15:14:02 -0600 (CST)
From nanog-bounces+bonomi=mail.r-bonomi.com () nanog org Fri Feb 19 22:32:48 2010 From: William Herrin <bill () herrin us> Date: Fri, 19 Feb 2010 23:32:10 -0500 Subject: Re: Spamhaus... To: Larry Sheldon <LarrySheldon () cox net> Cc: nanog () nanog org On Fri, Feb 19, 2010 at 8:35 PM, Larry Sheldon <LarrySheldon () cox net> wrote:On 2/19/2010 7:20 PM, William Herrin wrote:"If an SMTP server has accepted the task of relaying the mail and later finds that the destination is incorrect or that the mail cannot be delivered for some other reason, then it MUST construct an "undeliverable mail" notification message and send it to the originator of the undeliverable mail (as indicated by the reverse-path)."Does the RFC say what to do if the reverse-path has been damaged and now points to somebody who had nothing what ever to do with the email?Hi Larry, Re-reading the paragraph I quoted and you repeated, I'm going to say that the answer is "yes."
I'll bite. *HOW* do you send to the _originator_ (as *required* by the RFC you quoted) of the undeliverable mail, when the reverse path points to 'someone else'? Note well the exact lanugage used -- it does not say 'the party named in the reverse path', the 'claimed sender', 'putative sender' or any other similar equivocation that justifies sending to a forged address. It says "the originator". To me, that can be only iterpreted in _one_ way. To wit: as the party that _actually_ created and transmitted the message, _regardless_ of what the declared return path is. Since such a message is 'defective' (not RFC-compliant -- because the true point -of-origin is *NOT* in the reverse path, as it MUST be for an RFC-compliant message) on it's face, I will argue that there is no need to apply the 'required' handling for a 'proper' message to it.
Current thread:
- Re: Spamhaus..., (continued)
- Re: Spamhaus... Steven Champeon (Feb 19)
- Re: Spamhaus... Nick Hilliard (Feb 18)
- Re: Spamhaus... Christopher Morrow (Feb 18)
- Re: Spamhaus... John Levine (Feb 18)
- Re: Spamhaus... Marc Powell (Feb 19)
- Re: Spamhaus... Michelle Sullivan (Feb 19)
- Re: Spamhaus... Larry Sheldon (Feb 19)
- Re: Spamhaus... Marc Powell (Feb 20)
- Re: Spamhaus... Patrick W. Gilmore (Feb 20)
- Re: Spamhaus... Roger Marquis (Feb 20)
- Re: Spamhaus... Robert Bonomi (Feb 20)
- Re: Spamhaus... James Hess (Feb 20)
- Re: Spamhaus... Jon Lewis (Feb 20)
- Re: Spamhaus... James Hess (Feb 20)
- Re: Spamhaus... John Levine (Feb 20)
- Re: Spamhaus... Graeme Fowler (Feb 21)
- Re: Spamhaus... James Hess (Feb 20)
- Re: Spamhaus... Michelle Sullivan (Feb 21)
- Re: Spamhaus... Jon Lewis (Feb 21)
- Re: Spamhaus... Tony Finch (Feb 21)
- Re: Spamhaus... Michelle Sullivan (Feb 21)
- Re: Spamhaus... Jon Lewis (Feb 21)