Re: Gnus is losing IMAP articles

[David Z Maze]

Christian Lynbech <christian.lynbech@ericsson.com> writes:

> I read mail via IMAP towards an Windows Exchange server here at
> work. Mail arrive in "INBOX" and I have gnus retrieve mail from
> "INBOX" and split them out into a bunch of other folders where I do
> the reading.

Using nnimap, or an imap mail-source?

> When I occasionally fire up outlook, it will go to my "INBOX" and
> display its contents. It furthermore reads the first message.
>
> I have noticed that if outlook has marked a message as read, gnus will
> not handle it anymore, at least in the sense that further splitting of
> the "INBOX" will leave behind those messages that Outlook has
> touched.

The specific thing Outlook does is probably to mark the message as
read.  On my nnimap setup, I set nnimap-split-predicate to
"UNDELETED"; its default value is "UNSEEN UNDELETED", so if Outlook
reads the message then Gnus' IMAP mail splitting won't touch it.
Similarly, with an IMAP mail-source, you can set :predicate
"UNDELETED".  See e.g. info://gnus/Mail+Source+Specifiers under
`imap'.

> I am unsure whether reverting (through Outlook) the read state of such
> mails will make it reappear in front of gnus. I also think (but can't
> really remember) that if I ask gnus to go to the "INBOX" folder all
> such messages do in fact appear to gnus, indicating that the behaviour
> described is not really what you ae experiencing.

In that case you should be able to mark the articles as unread (in
Gnus, 'M SPC' from the summary buffer, perhaps 'M P b M-& M SPC' to
unread everything) and Gnus will happily split them for you.

  --dzm