How to view sent mails in a threaded conversation (IMAP)?

[Pankaj Jangid <pankaj@codeisgreat.org>]

Some mail providers give control to us. But some of them keep sent
emails in a separate folder, often called ‘Sent Items’.

In the first case, we can configure the ‘Gcc’ header via gcc-self
gnus-parameter.

In the 2nd case, where sent-emails are already stored in ‘Sent Items’,
if I don’t want to store a redundant copy, what is the proper way to
keep threads intact, at least in view?

Some mail providers are even more notorious. Even if I keep a redundant
copy of a sent-email in my folder of choice (‘Inbox’), they remove it
from there after sometime; probably after matching Message-ID etc.

I want to know what do Gnus users generally do to solve this. I
understand that it is not necessary to keep it that way
i.e. threaded. And my basic problem is not threaded conversations. The
main problem is search and looking messages in context. So, if I can
view all the messages in an ephemeral group then that would also solve
my problem. In fact, that would encourage me to keep sent emails in a
different folder instead of ‘Inbox’.

All of the above is in the context of IMAP backend.

-- 
Regards,
Pankaj Jangid