RFC 6121 section 3.1.3 mandates that when processing an inbound presence subscription request, if the contact exists and the user already has a subscription to the contact's presence, then the contact's server MUST auto-reply on behalf of the contact by sending a presence stanza of type "subscribed"

Openfire currently does not do this. This behavior was removed as part of , to prevent a loop of presence stanzas that occur when an RFC3921-style client acknowledges receipt of a ‘subscribed’ presence stanza by sending a ‘subscribe’ stanza.