Should archive server add Message-IDs to the cache?

[Hans de Graaff <J.J.deGraaff@twi.tudelft.nl>]

In one of the recent Gnus versions Lars changed caching of
Message-IDs. As a side effect, the archive server (which is nnfolder
based in my setup) now also adds Message-IDs to the ID cache.

This means that for all messages that I sent out, the Message-IDs are
put in the cache. If such a message comes back to me by some other
means (e.g. through a mailing list or an alias), then it will be
handled as a duplicate, even though I never saw the original, as I
don't read my archive server.

If I now add that I normaly 'delete duplicates, then my confusion
about 'disappearing' articles after upgrading becomes apparent. 

I have discussed this a bit with Lars, with my main end of the
argument being that the archive server should not add Message-IDs to
the cache of IDs. Lars suggested to bring it up on the list to see
what other people think.

Hans