Install gajim-antispam by entering the following commands in the terminal:
sudo apt update sudo apt install gajim-antispam
Description:
Gajim plugin to block some incoming messages
With this plugin, Gajim users can block: * Incoming PubSub messages * Incoming Messages from Contacts not in your Roster * You can set a question that has to be answered from contacts not in your roster, before they can pass the spam filter Note, that the plugin might interact badly with some IRC gateways.
Homepage: https://dev.gajim.org/gajim/gajim-plugins/wikis/AntiSpamPlugin
Version: 1.4.4-3
Section: universe/net