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Status: Verified (1)

RFC 2645, "ON-DEMAND MAIL RELAY (ODMR) SMTP with Dynamic IP Addresses", August 1999

Source of RFC: Legacy
Area Assignment: app

Errata ID: 404
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Tony Finch
Date Reported: 2005-08-30
Verifier Name: Barry Leiba
Date Verified: 2012-05-17

Section 5.2.1 says:

   If the authentication used by the customer does not provide access to
   all of the domains specified in ATRN, the provider MUST NOT send mail
   for any domains to the customer; the provider MUST reject the ATRN
   command with a 450 code.

It should say:

   If the authentication used by the customer does not provide access to
   all of the domains specified in ATRN, the provider MUST NOT send mail
   for any domains to the customer; the provider MUST reject the ATRN
   command with a 550 code.

Notes:

This seems to be contrary to SMTP's theory of reply codes:

A rule of thumb to determine whether a reply fits into the 4yz or the 5yz category (see below) is that replies are 4yz if they can be successful if repeated
without any change in command form or in properties of the sender
or receiver (that is, the command is repeated identically and the
receiver does not put up a new implementation.)

If the ODMR client repeats the ATRN request in this situation, it will be rejected again. So a 550 response would be more appropriate.

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