14 Feb
2006
14 Feb
'06
4:22 a.m.
Greylisting does seem to work - the only problems I've had have been with Gmail not waiting long enough, and handheld devices running Windows Mobile 2003 and 5 timing out because they think the connection's down (probably a design feature that). Easy enough to fix though.
It seems particularly good for dealing with virus-generated spam.
I think you are thinking of teergrubbing. Delaying the connection answering or replying.. Teergrubbing is also a good Anti-Spam feature. Thanks Craig