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Re: incorrect spam setups cause spool messes on forwarders

  • From: Suresh Ramasubramanian
  • Date: Mon Dec 01 14:04:00 2003

Randy Bush  writes on 12/1/2003 1:50 PM:

interesting but utterly irrelevant.  the question was not how
verison decided it was spam.  the point was that their server
returned a 450 as opposed to a 5xx (550 looks good), and this
causes net damage.

They haven't yet determined that it is spam. So, RFC nitpicking wise, they are right.

On the other hand, from a mail operations standpoint, I personally feel that sender verification, graylisting and other methods that rely on 4xx'ing email are a bad idea, as they makes things inconvenient for a whole lot of ISPs ... and because these emails have to be either 5xx'd or trashed sometime sooner or later.

srs (postmaster|suresh) // gpg : EDEDEFB9
manager, security and antispam operations