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Re: SMTP RFC: "MUST NOT" change or delete Received header

Ted Lemon <ted.lemon@nominum.com> Mon, 31 March 2014 00:38 UTC

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Subject: Re: SMTP RFC: "MUST NOT" change or delete Received header
From: Ted Lemon <ted.lemon@nominum.com>
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Date: Sun, 30 Mar 2014 20:38:03 -0400
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To: John C Klensin <john-ietf@jck.com>
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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?

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