Sm wrote:
If a few legitimate customers are enough to get a domain off a blacklist, then most of the domains currently listed will sooner or later get off. There will always be false positives because one man's spam is another man's ham. Someone should draw the line somewhere.
I definitely agree that this merits more discussion... and I see that there has been more discussion.
...and forgive me for stating that obvious...
But, I would add that a huge consideration is the obfuscation techniques of the spammer based on the sending server and the contents of the spam. For example, if every other word is spliced with a fake html tag or if the spam is being propagated by a virus, then (unless it's some kind of "joe jobs" smear campaign), you can count on it being spam.
Rob McEwen