https://bitmessage.org/wiki/Main_Page - Bitmessage is a P2P communications protocol used to send encrypted messages
http://bittext.ch/_MhiklxwCp - Q's AKTIVLIST OF CHANS, BROADCASTS & MAILING LISTS
Starting from version 0.3.5, Bitmessage introduced an additional feature called a chan, a decentralized anonymous mailing list. Unlike traditional mailing lists used via email:
- a chan cannot be shutdown by taking down any server or a group of servers due to decentralized nature of chans.
- a chan cannot be effectively censored since any Bitmessage user who knows the chan passphrase can read the chan or post any message into the chan.
- within a chan, user messages are anonymous to such a degree that messages contain neither the sender's nor the receiver's Bitmessage address.