[143108] in North American Network Operators' Group
Re: [BULK] Re: SORBS contact
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Fri Jul 29 11:23:42 2011
To: William Herrin <bill@herrin.us>
In-Reply-To: Your message of "Fri, 29 Jul 2011 09:48:44 EDT."
<CAP-guGXAWz0du6aLQPwXMZm2TBWPYhjtKSv4ycBiMJxM1BpFCg@mail.gmail.com>
From: Valdis.Kletnieks@vt.edu
Date: Fri, 29 Jul 2011 11:22:30 -0400
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On Fri, 29 Jul 2011 09:48:44 EDT, William Herrin said:
> Correction: It's a standard way to denote that "this mail is a bounce
> report."
Correction to your correction: What the RFC actually says:
4.5.5. Messages with a Null Reverse-Path
There are several types of notification messages that are required by
existing and proposed Standards to be sent with a null reverse-path,
namely non-delivery notifications as discussed in Section 3.7, other
kinds of Delivery Status Notifications (DSNs, RFC 3461 [32]), and
Message Disposition Notifications (MDNs, RFC 3798 [37]). All of
these kinds of messages are notifications about a previous message,
and they are sent to the reverse-path of the previous mail message.
(If the delivery of such a notification message fails, that usually
indicates a problem with the mail system of the host to which the
notification message is addressed. For this reason, at some hosts
the MTA is set up to forward such failed notification messages to
someone who is able to fix problems with the mail system, e.g., via
the postmaster alias.)
It's *not* just "bounce reports" (in particular, DSNs and MDNs are not
non-delivery (bounce) messages in the sense of section 3.7, and both
can be generated in response to *successful* deliveries).
generated for *successful* deliveries).
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