At 5:24 PM -0800 27/2/03, Chris Wedgwood wrote:

On Fri, Feb 28, 2003 at 11:27:06AM +1300, Russell Fulton wrote:

...

This isn't really feasible since the whole point of the RBL is that you dump the session before it sends anything so you don't know who its for.

I *think* barfing (5xx) when you get a connection or on "MAIL FROM" strictly speaking isn't allowed in the RFC (I've not check rfc2821 so this may have changed since '821).

From RFC 2821 3.1 Session Initiation The SMTP protocol allows a server to formally reject a transaction while still allowing the initial connection as follows: a 554 response MAY be given in the initial connection opening message instead of the 220. I.e. if an RBL'd host connects to you, even before the HELO/EHLO, you can tell them to go away 554 Transaction failed (go away evil spammer) -- Michael Newbery IP Architect TelstraClear Limited