Use server JID as 'from' address for notifications.
Each PubSub node is a delivery target for the Push Service, which could represent multiple devices for a single user.
-In order to prevent information leaks, each node SHOULD be configured with a 'whitelist' access model so that only trusted entities are able to view or subscribe to published notifications. Furthermore, the 'publish-only' affiliation SHOULD be used to allow acceptable entities (such as the user's bare JID) to publish to the node to trigger notifications.
-Care SHOULD be taken to ensure that publish requests are coming from the user's server and not from other third-party client applications using the full JID of a user. A Push Service MAY opt to only accept or further process publish requests from bare JIDs to ensure that only a user's server is able to publish, but it SHOULD instead use publish options with credentials shared only with the user's server (see Enabling Notifications).
+In order to prevent information leaks, each node SHOULD be configured with a 'whitelist' access model so that only trusted entities are able to view or subscribe to published notifications. Furthermore, the 'publish-only' affiliation SHOULD be used to allow acceptable entities (such as the server JID and the user's bare JID) to publish to the node to trigger notifications.
+Care SHOULD be taken to ensure that publish requests are coming from the user's server and not from other third-party client applications using the full JID of a user. A Push Service MAY opt to only accept or further process publish requests from server JIDs and bare user JIDs to ensure that only a user's server is able to publish, but it SHOULD instead use publish options with credentials shared only with the user's server (see Enabling Notifications).
Other elements MAY be included if relevant for the notification.