Spam is sending unsollicited messages to XMPP users. Most of the time it happen in public chat rooms because client generally do not accept messages from contact that are not in the user roster.
Preventing SPAM on MUC require several conditions:
- Preventing automation:
- We need to be sure that bots cannot register accounts automatically
- We need to prevent bots from joining chat rooms.
- Blocking troublemaking users on a large portion of the XMPP network at once:
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