On Fri, 2006-01-20 at 13:09 -0700, Michael L Torrie wrote: > I'm not sure you can gray list on a per-user basis. Usually such > filters work during the HELO stage of the smtp exchange. If you did it > after the RCPT TO: stage, I believe the message would bounce > immediately, which is not what you want. > > This this is not the case, then I am even that much happier.
A 4XX response to RCPT will prompt a retry. I've heard that some older versions of Groupwise treat 4XX as permanent errors, but that's just retarded. Otherwise it should work fine. Corey
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