draft-ietf-imapext-thread

[Arnt Gulbrandsen <[e-mail]>]

The thread extension offers no way to get threading information for only
some mail (typically, the newly arrived messages).  Isn't this a problem?

The thread=references model specifies an algorithm to be used, in detail,
and that algorithm is one that makes several passes over the entire set of
messages.  The algorithm is complex, and it's not clear to me whether it
can be adapted to be incremental without possibly changing its output, and
whether such changes are permitted by the draft.

So, if a server does incremental References:-based threading on delivery,
can it advertise thread=references?

--Arnt