Blackhole DNS

[john@xxxxxxxxxxxxxxx (John Sievert)]

I have been kind of looking at the effectiveness of Blackhole DNS. 
We originally had used relays.ordb.org and didn't trap hardly any 
spam.  When we switched to relays.osirusoft.com and bl.spamcop.net we 
suddenly had a much more successful experience.  In point of fact, we 
now check each email against the three mentioned.

Anyone else have any such experiences?  Which do you use for 
successful dynamic host filtering?

j.
--
"The box said, 'Requires Windows 98 or better'.  So I bought a Mac."
-unknown