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Re: Gnus: Gcc and imap folders

From: Tassilo Horn
Subject: Re: Gnus: Gcc and imap folders
Date: Mon, 12 Sep 2016 11:58:10 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

Arash Esbati <> writes:

Hi Arash,

> I can't get Gcc and threading work reliably in imap folders.  Here an
> example: Incoming mail is shown without parent.
> [img]
> When I hit `A r', the parent is shown and I get threading:

I can't see your screenshot (I'm ssh-ed into a server) but can it be
that you don't see the parents because you've already read them before?
By default, Gnus won't show old mail.  That's controlled by this

,----[ C-h v gnus-fetch-old-headers RET ]
| gnus-fetch-old-headers is a variable defined in ‘gnus-sum.el’.
| Its value is ‘some’
| Original value was nil
| Documentation:
| Non-nil means that Gnus will try to build threads by grabbing old headers.
| If an unread article in the group refers to an older, already
| read (or just marked as read) article, the old article will not
| normally be displayed in the Summary buffer.  If this variable is
| t, Gnus will attempt to grab the headers to the old articles, and
| thereby build complete threads.  If it has the value ‘some’, all
| old headers will be fetched but only enough headers to connect
| otherwise loose threads will be displayed.  This variable can
| also be a number.  In that case, no more than that number of old
| headers will be fetched.  If it has the value ‘invisible’, all
| old headers will be fetched, but none will be displayed.
| The server has to support NOV for any of this to work.
| This feature can seriously impact performance it ignores all
| locally cached header entries.  Setting it to t for groups for a
| server that doesn’t expire articles (such as,
| leads to very slow summary generation.
| You can customize this variable.

> One thing occured to me is that pretty printing of char numbers is
> broken (n/a) -- it looks fine for the same message in my sent-mail
> archive (I Gcc all mails into nnml+archive:sent-mail, see below).

What are "char numbers"?


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