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Re: New Issue: NOOP clarification

2007-11-29 10:54:30
On Wed, 28 Nov 2007 17:39:13 EST, Hector Santos said: NOOP (NOOP)

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

There's 2 cases here:

1) It's trying to tell you "421 It's nap time here".  In this case, it's a
totally legitimate reply - and I've even seen systems that keep a hot
connection open to recent/frequent destinations that intentionally send
keep-alive NOOPs specifically to reap 421's and unexpected closes from the
other end.

2) It's a bug, and somebody needs to learn to put down the crack pipe before

No change to the RFC is needed for the first, as it's working as designed.
No change is needed for the second, because we can't legislate entry into
substance abuse programs in an RFC.

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