[yborg]

I think I've been using it for nearly 15 years. And I selfishly hope it never gets more popular since it's so obscure that it seems to fly under the radar of most blacklists despite its 20+ year history. I like how it keeps a count of all of the messages it's blackholed to a given address so you can see who pimped you like a used car if you use a unique address per signup.