http://dnbible7sqskwppgaqohboxz7u5kzffjzdx3lxzpjtt3s6tzeiytb5ad.onion/bible/communication-methods/bitmessage/index.html
This means that the core python team is no longer actively developing it, bugs or holes could eventually be found in python2 that might put risk on Bitmessage, make sure anything sensitive you still use PGP. What is Bitmessage? Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.