On 15/02/06, Ewen McNeill
PRNG or discovered list twice. Perhaps 30-60 minutes apart. Not much extra work, for much more effectiveness.)
What's to stop them doing this anyway, regardless of greylisting. In fact spammers are likely to do it anyway. Consider the first spammer to do it is going to have more volume than other spammers. Soon they'll all be copying each other. Eventually everyone will start using default deny for email.
Seems to me that the end result of this particular "arms race" is that mail delivery gets permanently delayed (since no one can "safely" turn off greylisting without getting multiple copies of the junk), and we end up no further forward on the spam/virus problem.
Seems like for the normal person with the volume of spam increasing constant email might eventually become essentially useless. Even the big guys have issues. I stopped using yahoo mail because they couldn't seem to deal with spam. -- Nicholas Lee http://stateless.geek.nz gpg 8072 4F86 EDCD 4FC1 18EF 5BDD 07B0 9597 6D58 D70C