Sync two ~/Mail directories on Windows?

[Kai.Grossjohann@CS.Uni-Dortmund.DE (Kai Großjohann)]

(Potential off-topic alert.)

Suppose you have two computers, both running Windows (98SE, say) and
you want to use Gnus to read mail on them.  Most of the time, you use
the desktop machine, but a few times a week you want to use the laptop
instead.  The laptop has sufficient disk space, so you want a full
copy of ~/Mail (and other files such as ~/.newsrc.eld and so on).

It is not practical to just transfer the whole ~/Mail directory every
time, it being 600MB or so and the transfer takes quite a while even
on fast ethernet...

On a Unixish system, life is simple: use rsync in one direction before
traveling and in the other direction after traveling.  Problem solved.

But on a Windows system?

Does the `briefcase' feature do the trick?  Or is it possible to get
rsync to work on Windows (both client and server side!)?  Or maybe
even dump/restore, with incremental dumps?

It seems that GNU tar has a feature to ignore old files -- that could
be used, perhaps.

(The mail backend is nnml, so I guess it is not necessary to be able
to transfer file diffs; just transferring the new files ought to be
sufficient.)

kai
-- 
I like BOTH kinds of music.