[jdev] Messages to unsubscribed contacts

[Robin Redeker]

On Sun, Dec 09, 2007 at 02:19:19AM +0100, Jakob Schröter wrote:
> On Sunday December 9 2007, Tomasz Sterna wrote:
> > On So, 2007-12-08 at 19:01 +0100, Robin Redeker wrote:
> > > User A sends a message to the bare JID of user B which is not subscribed.
> > > User B answers to the full JID of user A.
> >
> > IIRC this full-jid chat binding is discouraged and messages should
> > always be exchanged between bare JIDs.
> > If you want to hold to a specific conversation thread, use the <thread/>
> > item.
> 
> I recall that, too, but can't remember where I read it. Is this documented 
> anywhere? draft-saintandre-rfc3921bis-04/-05 currently has this to say about 
> the topic (section 5.1.1):
> 
> "If the message is being sent in reply to a message previously received from 
> an address of the form <user at domain/resource> (e.g., within the context of a 
> chat session), the value of the 'to' address SHOULD be of the form 
> <user at domain/resource> rather than of the form <user at domain> unless the 
> sender has knowledge (via presence) that the intended recipient's resource is 
> no longer available."

That section was exactly why the question came up, it says something about
a 'chat session' (a undefined mildly fuzzy term). And the SHOULD there seems
to indicate that one should take care of this.

The 'best practice' to send messages always to the bare JID makes things a lot
easier for client developers and users IMO :-)

Thanks!
   Robin