MS's new antispam idea

["Stephen J. Wilcox" <steve () telecomplete co uk>]

http://news.bbc.co.uk/1/hi/technology/3324883.stm

Ok so in summary you have to use a bit of CPU to solve a puzzle before it lets 
you send email.

So either this doesnt work because spammers dont actually use their own PCs to 
send email or we are talking about a whole new mail protocol, either way I'm 
thinking this isnt going to work and its yet another publicity stunt.

Steve