Re: IMAP Splitting with multiple mailboxes

[Kai Grossjohann <kgrossjo@eu.uu.net>]

Timothy Brown <tim@tux.org> writes:

> I have three nnimap select methods selecting from different servers.
> When using nnimap splitting - fancy splitting - where do the messages
> end up if there is no declaration of nnimap+host:folder,

I think that splitting cannot cross server boundaries.  That is, if
you specify "INBOX.foo" as the target group for a server, then it
will be on the server currently being split.

> and just a folder declaration?  Do they end up local to the nnimap
> server that is being split from at the time?

I think so.

> Can splitting occur between servers?

I think that's not possible.

> Can I see messages on one server and have them moved via nnimap to a
> different server using splitting?

Well, splitting happens before you see the messages.  So you can't
see them before splitting...  Maybe you mean something else?

> How does : spam-split interact with nnimap fancy splitting,
> particularly in the concept of having multiple virtual servers?

Huh.  Dunno.  I guess that if it says that INBOX.spam is the target,
then this will be on the server being split...


A question you didn't ask is how to have different split rules for
different servers.  The variable nnimap-split-rule appears to allow
this, but I don't see how it would work for fancy splitting.

[time passes]

Oh!  Now I see.  Here's what you do:

(setq nnimap-split-rule '(("server1" ("INBOX" tim-split-fancy-1))
                          ("server2" ("INBOX" tim-split-fancy-2))))

(setq tim-split-fancy-rule-1
      -value-that-looks-like-nnimap-split-fancy-)
(setq tim-split-fancy-rule-2
      -another-value-looking-like-nnimap-split-fancy-)

(defun tim-split-fancy-1 ()
  (let ((nnimap-split-fancy tim-split-fancy-rule-1))
    (nnimap-split-fancy)))

(defun tim-split-fancy-2 ()
  (let ((nnimap-split-fancy tim-split-fancy-rule-2))
    (nnimap-split-fancy)))

The idea is that you define two different functions to perform the
splitting, and both functions essentially do like the function
nnimap-split-fancy, but temporarily change the value of the
nnimap-split-fancy variable.

That's a common Lisp trick.

All of the above is untested.  I never tried anything that fancy with
splitting ;-)

Kai