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From: Simon Josefsson <jas@pdc.kth.se>
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Subject: Re: counting of unread articles in IMAP
Date: 08 Nov 1999 10:14:01 +0100
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Denys Duchier <Denys.Duchier@ps.uni-sb.de> writes:

> My IMAP folders often indicate an incorrect number of unread articles
> (in the Group buffer), e.g. it will say 8 when there are in fact 5
> unread messages.  Simply visiting the corresponding folder seems to
> resynchronize the counter, which suggests that the correct number is
> available.  Is there a good reason why I am at first presented with
> guess work rather than fact?  I.e. isn't there a way to ask the IMAP
> server for the number of unread messages (I understand the limitations
> of NNTP, but isn't IMAP supposed to be way cooler?).

Yes, but Gnus uses a protocol similar to NNTP to talk to the backends,
so there is no way to tell Gnus about that number (w/o changing the
backend interface in Gnus), it can only report low/high article number
and Gnus make a educated guess about the number of unread articles.

Hopefully this will change once the more important nnimap bugs has
been solved.