On Fri, 2009-10-16 at 16:25 -0400, Adam Katz wrote: > My own proposal to fixing this is to bring back Blue Security's > do-not-email list, which is to say a freely available index of secure > hashes representing email addresses that have opted out of bulk email. > (Recall that the controversial aspect of Blue Security's methods is > what they did to violators, which I'm not touching here.)
The other problem with it is that it can be used to scrub lists and get a set of real users who don't want spam. There is no guarantee that spammers will be ethical and remove the DNE recipients - they may find a better return throwing out the addresses that don't match... And then there are hash collisions...
