Keeps spam mail away! Rated 5 out of 5 stars
Whenever I have to registrate me for simply giving my address to be spammed a lot I´m using BLOODY VIKINGS.. Don´t want to imagine how "heavily loaded" my email-server would be without this nice little tool.. Very simple to apply when needed: with contextmenu!
And there are different (!) services available - some websites dislike one or another..