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New Issue: NOOP clarification

2007-11-28 15:59:29

RFC 2821 (RFC 2821bis) says for the NOOP:

4.1.1.9 NOOP (NOOP)

   This command does not affect any parameters or previously entered
   commands.  It specifies no action other than that the receiver send
   an OK reply.

   This command has no effect on the reverse-path buffer, the forward-
   path buffer, or the mail data buffer and may be issued at any time.
   If a parameter string is specified, servers SHOULD ignore it.

   Syntax:
      "NOOP" [ SP String ] CRLF

I just came across a transaction where a Microsoft ESMTP server rejected it with a 421 response.

The paragraph should include semantics that the NOOP command itself SHOULD be ignored, not just the string SHOULD be ignored. Maybe:

   This command does not affect any parameters or previously entered
   commands.  It specifies no action other than that the receiver send
   an OK reply.  Server SHOULD ignore the NOOP command by issueing a
   250 response.

--
HLS

--
Sincerely

Hector Santos, CTO
http://www.santronics.com
http://santronics.blogspot.com

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