3D Mailbox LIGHT 188.8.131.52
Tiny 3-megabyte email program with the world's best spam filter -- SpamBayes -- built right in.
Never before has filtering spam been so simple. Set your spam tolerance with a sliding scale, classify a few messages with a mouseclick, and you're done. Under the hood there's also integrated email-based IM and chat, email status tracking, HTML support, and integrated whitelist and blacklist management.