[Asrg] greylisting, was Software bashing

[John Levine]

>So I think the spammers are now fighting greylisting, and greylisting
>is becoming less and less effective.

I looked at my greylist logs for the past month.  It shows 4911
previously unseen IPs that retried, and 51,348 that didn't.  I'd say
that a technique that turns away 91% of the mail it touches is still
pretty effective.

The month before that the numbers were 4707 and 41,487, for about 90%,
so in the short term at least, it's pretty consistent.  I have data
back to May, could crunch it if people wanted.

R's,
John