Did you ever try to get 5 different people to aggree to do something that wasn't completely in their own best interest. Well, Yahoo is trying to do just that, with the re-invention of 'DomainKeys'.
DomainKeys have been brought up, at least, three different times, that I know of. And never really gotten off the drawing boards, so to speak. Now Yahoo wants to use them to stop spam.
Full Artical Here
Yahoo has developed a system that will go a long way toward curbing spam, the company claims. But the technology's success is dependent on its widespread industry adoption beyond the borders of Yahoo's e-mail servers, it says
Achieving that type of consensus from people who run mail servers around the world will be difficult, especially at companies that may fail to see what value this has for them, he says. It's clear that initiatives such as this one are important for big e-mail service providers such as Yahoo, Microsoft's MSN, and America Online, but they are much less so for other companies and organizations that aren't in the e-mail provision business, he says
I believe that it won't fly, because you would have to get all the ISP's that have there own mail server (most of them) to go along with the program, or be limited to onlythe big ones, Yahoo, MSN and such.