Libervia CLI Tip 13:
Somebody is annoying you or you're receiving unwanted messages? You can block a single entity with `li blocking block some_jid@example.org` or a whole domain with `li blocking block example.net`.
See who is already blocked with `li blocking list`, and remove an entity from the list with `li blocking unblock some_jid@example.org`.
The commands use XEP-0191, which must be supported by your server.