[sylpheed:37227] Re: Manually grouping unthreaded messages

[Anton Shepelev]

Ben Hancock:

> I sometimes receive messages from correspondents which
> have the same subject line and are part of the same chain,
> but for whatever reason (perhaps the other user's mail
> client configuration) are not treated as belonging to the
> same thread by Sylpheed on my end.

Yes, many modern e-mail clients break chaining, and no one
cares, because those clients are written for typical
corporate users who are accustomed to the default Outlook
configuation, in which outgoing and incoming mail is stored
in different folders so that no threading is possible at
all. To keep the context, the entire thread provided at the
bottom of each e-mail with headers and signatures eating up
a considerable portion of space and killing the signal-to-
noise ratio.

> I have "Thread View" enabled, and other messages are
> threading fine, so it does seem that this is particular
> issue with only certain mails.

Sylpheed, as any decent client, threads e-mails by the
References: header:

  https://jdebp.uk/Proposals/gnksoa-mua.html#Display

You can check whether the broken e-mails have that header
poining the the Message-Id: of the previous
e-mail -- pressing Ctrl+H will cause Sylpheed to display all
headers.

> For easier viewing, I would like to link these messages so
> that they belong to the same thread. Is there a way that I
> can manually do this?

No easy way that I know of, but I believe you can /manually/
edit a broken message, inserting the desired References:
header via a text editor.  Sylpheed conveniently stores
e-mails one per file on your HDD.

Apart from that -- complain about the problem in the user
community of the faulty e-mail client, contact their
support, and ask the correspondent to ditch the defective
software...