Blocking Communication

Blocking Communication:

In XMPP this is done by managing privacy lists using the 'jabber:iq:privacy' namespace.
Server-side privacy lists enable the following use cases:

NOTE: A user may define one or more privacy lists, which are stored by the user's server.
Each <list/> element contains one or more rules in the form of <item/> elements, and each <item/> element uses attributes to define a privacy rule type, a specific value to which the rule applies, the relevant action, and the place of the item in the processing order.

The syntax is as follows:

Note: The <item/> element may contain one or more child elements 

The allowable child elements are:

• <message/> -- blocks incoming message stanzas
• <iq/> -- blocks incoming IQ stanzas
• <presence-in/> -- blocks incoming presence notifications
• <presence-out/> -- blocks outgoing presence notifications