RFC Errata
RFC 5321, "Simple Mail Transfer Protocol", October 2008
Note: This RFC has been updated by RFC 7504
Source of RFC: IETF - NON WORKING GROUPArea Assignment: art
Errata ID: 1543
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Brett Watson
Date Reported: 2008-10-08
Held for Document Update by: Pete Resnick
Section 3.8 says:
SMTP clients that experience a connection close, reset, or other communications failure due to circumstances not under their control (in violation of the intent of this specification but sometimes unavoidable) SHOULD, to maintain the robustness of the mail system, treat the mail transaction as if a 451 response had been received and act accordingly.
It should say:
SMTP clients that experience a connection close, reset, or other communications failure due to circumstances not under their control (in violation of the intent of this specification but sometimes unavoidable) SHOULD, to maintain the robustness of the mail system, treat the mail transaction as if a 421 response had been received and act accordingly.
Notes:
SMTP clients are told to act as though a 451 response ("Requested action aborted: local error in processing") had been received when context clearly indicates that a 421 response ("Service not available, closing transmission channel") was intended.