Mailing List SIMS@mail.stalker.com Message #11306
From: Warren Michelsen <Warren@MDCCLXXVI.com>
Subject: Re: Permanent or Temporary?
Date: Fri, 19 Jul 2002 11:22:37 -0700
To: SIMS Discussions <SIMS@mail.stalker.com>
At 10:04 AM -0700 07/19/2002, Global Homes Webmaster wrote:

RFC 821 (<http://www.faqs.org/rfcs/rfc821.html>) has a brief discussion of
this in its Appendix E, 'Theory of Reply Codes.' It says, in part:

    4yz   Transient Negative Completion reply

    The command was not accepted and the requested action did not occur.
    However, the error condition is temporary and the action may be
    requested again.  The sender should return to the beginning of the
    command sequence (if any). It is difficult to assign a meaning to
    "transient" when two different sites (receiver- and sender- SMTPs) must
    agree on the interpretation.  Each reply in this category might have a
    different time value, but the sender-SMTP is encouraged to try again.
    A rule of thumb to determine if a reply fits into the 4yz or the 5yz
    category (see below) is that replies are 4yz if they can be repeated
    without any change in command form or in properties of the sender or
    receiver.  (E.g., the command is repeated identically and the receiver
    does not put up a new implementation.)

OK, so it sounds like 4xx codes are going to be the result of network errors and such, eh?

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