Craig Skinner <craig.skinner@kepax.co.uk> writes:

quoted text
> 'bots getting smart eh? Bugger! If that is the trend, greylisting
> starts to lose its value as spammers adapt to the RFCs.

If they adapt to greylisting and start following relevant RFCs, we've
succeeded in making spamming more expensive. I don't see that
happening much, though.  The spam that reaches content filtering here
has managed to get itself into the queue on real mail servers which
for some reason allows them.

On the 'spamd looks like an open relay' issue, it would make sense to
use a relay checker which actually checks for mail received, not just
the status codes.  On the other hand I actually like that part of
spamd the way it is.  Spammers who apparently think every IP address
in our range is an open relay occasionally swell our greylists quite a
bit.  None of it ever gets delivered, of course, but we see the
attempts quite often these days.

-- 
Peter N. M. Hansteen, member of the first RFC 1149 implementation team
http://bsdly.blogspot.com/ http://www.datadok.no/ http://www.nuug.no/
"Remember to set the evil bit on all malicious network traffic"
delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.