Quetza writes "Looking for an e-mail system that offers security of the message and authentication of the sender and receiver? Thinking PGP or something similar? Rather spend $2 per message and use Certified Email. They offer "First Internet E-mail tracking System That Enables Users to Send Messages and Verify Receipt". The entire system works via the web-page, where users are expected to log-on and retrieve their "certified e-mail". In other words, replace the e-mail system with a single, cetralized server; add a few notification systems, and you get certifiedemail.com. And with a claim of 10,000 e-mail messages going through the system a day, one can only wonder how long before Hotmail et al will jump on the same bandwagon. "