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RFC 2821: Para 4.2.5 refers to 'permanent error stats (5yz)' twice. It...

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Comment by Mathias
Submitted on 10/15/2006
Related RFC: RFC 2821
Rating: Not yet rated	Rate this comment:
Para 4.2.5 refers to 'permanent error stats (5yz)' twice. It seems to me (also by the reference to a subsequent attempt by the client, that the first mention is really about 'temporary error status (4yz)'\|[...]\| When an SMTP server returns a permanent error status (5yz) code after\| the DATA command is completed with <CRLF>.<CRLF>, it MUST NOT make\| any subsequent attempt to deliver that message. The SMTP client\| retains responsibility for delivery of that message and may either\| return it to the user or requeue it for a subsequent attempt (see\| section 4.5.4.1).\|\| The user who originated the message SHOULD be able to interpret the\| return of a transient failure status (by mail message or otherwise)\| as a non-delivery indication, just as a permanent failure would be\| interpreted. I.e., if the client SMTP successfully handles these\| conditions, the user will not receive such a reply.\|\| When an SMTP server returns a permanent error status (5yz) code after\| the DATA command is completely with <CRLF>.<CRLF>, it MUST NOT make\| any subsequent attempt to deliver the message. As with temporary\| error status codes, the SMTP client retains responsibility for the\| message, but SHOULD not again attempt delivery to the same server\| without user review and intervention of the message.

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