Re: SMTP RFC: "MUST NOT" change or delete Received header
Dave Crocker <dhc@dcrocker.net> Mon, 31 March 2014 02:16 UTC
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Date: Sun, 30 Mar 2014 19:14:02 -0700
From: Dave Crocker <dhc@dcrocker.net>
Organization: Brandenburg InternetWorking
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To: Ted Lemon <ted.lemon@nominum.com>
Subject: Re: SMTP RFC: "MUST NOT" change or delete Received header
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On 3/30/2014 5:38 PM, Ted Lemon wrote: > On Mar 30, 2014, at 6:44 PM, John C Klensin <john-ietf@jck.com> wrote: >> Whether one accepts it or not, "been here already" tests are not >> about debugging. They are about loop detection and DoS attacks. > > Are there MTAs that make use of the Received: header for loop detection? MMDF had it, probably from the early 1980s, but certainly sometime during the 80s. I have a vague recollection of adding it to the code, though that could be an invented memory. The Received header field was not in RFC 733, and was standardized in late 1982 (RFC 822), just before I stopped doing MMDF work. More likely, it was added by the folk who did the follow-on work for MMDF II, but still probably early/mid 1980s. Back then, passing through the same host more than a couple of times would be a good indication of looping. d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net
- SMTP RFC: "MUST NOT" change or delete Received he… Kevin M. Gallagher
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Randy Bush
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dave Cridland
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Eliot Lear
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Ted Lemon
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dave Aronson
- Re: SMTP RFC: "MUST NOT" change or delete Receive… David Morris
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John Levine
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dale R. Worley
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dave Crocker
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Scott Brim
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Hector Santos
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Hector Santos
- Re: SMTP RFC: "MUST NOT" change or delete Receive… David Morris
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Ted Lemon
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John Levine
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dick Franks
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Hector Santos
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Hector Santos
- RE: SMTP RFC: "MUST NOT" change or delete Receive… Christian Huitema
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Phillip Hallam-Baker
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John Levine
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John C Klensin
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Phillip Hallam-Baker
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John C Klensin
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Randy Bush
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Randy Bush
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Ted Lemon
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John Levine
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John Levine
- Re[2]: SMTP RFC: "MUST NOT" change or delete Rece… mohammed serrhini
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dave Crocker
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John C Klensin
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Dave Cridland
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Hector Santos
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Michael Richardson
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John C Klensin
- Re: SMTP RFC: "MUST NOT" change or delete Receive… John C Klensin
- Mail System Reliability [was: Re: SMTP RFC: "MUST… Hector Santos
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Phillip Hallam-Baker
- Re: SMTP RFC: "MUST NOT" change or delete Receive… Murray S. Kucherawy