[Mimedefang] OT - MS Exchange 2003 SP2 and greylisting
David F. Skoll
dfs at roaringpenguin.com
Sat Jun 16 10:37:30 EDT 2007
Yizhar Hurwitz wrote:
> BTW - I have noticed the problem (at the sender side) against hosts that
> do greylisting at the "RCPT TO" stage,
> and haven't noticed it against hosts that greylist after DATA (such as
We do post-DATA greylisting in CanIt for this reason. There were
other older MTAs (I think old versions of Novell Groupwise) that
didn't handle RCPT-time greylisting properly. It seems like MSFT is
re-inventing old bugs. :-)
> I don't want to raise the argue about how good or bad greylisting is,
> just to mention the technical details to you all.
We find it is still surprisingly effective. Log in as demo/demo to
see our statistics:
"Entered Hit-and-Run" means a message was greylisted. "Exited Hit-and-Run"
means a message was retransmitted.
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