> -----Original Message----- > From: [email protected] [mailto:owner-ietf- > [email protected]] On Behalf Of J.D. Falk > Sent: Friday, March 26, 2010 8:50 AM > To: [email protected] > Subject: Re: New Version Notification for draft-macdonald-antispam- > registry-00 > > Yup, me too. I'd also be curious how the most common MTAs (sendmail, > postfix, exchange, etc) react to reply codes they've never seen before. > They /should/ handle 'em gracefully, but there could be surprises.
I don't recall seeing any code in sendmail that reacts to other than the first digit of the SMTP reply code itself, and nothing that looks at the enhanced status code. No idea about other MTAs. This might create a need though.
