> i have seen a number of spammer outfits doing this: following the RFC > and retrying until the spam gets though and they're whitelisted, then > they're free to push crap through. any thoughts on how to best combat > this behavior besides spamassassin + amavisd (i.e. wasting cpu cycles > and bandwidth)? >
Search the archives. this has been discussed extensively
and talks have been presented on the subject. read before posting.
-Bob
