At 6:12 pm -0500 29/11/2007, Hector Santos wrote:
So 421 is implied for real server critical shut down reasons in 2821 compliant servers across the board.
However shutting down because it doesn't like a parameter on a NOOP command is to me a very clear violation of section 3.9 of RFC 2821 (section 3.8 in 2821bis):
In particular, a server that closes connections in response to commands that are not understood is in violation of this specification. Glenn.
