[Evolution] Spam in IMAP inbox folder when viewed outside of Evolution.

[Nick Jenkins <nickpj gmail com>]

Hi all,

I am currently setting up reading IMAP email on my mobile phone, but one
problem is the mail that I have marked as spam in Evolution. In
Evolution it's quarantined separately into a "Junk" folder for that IMAP
account, but when I use the IMAP mobile phone client, all the spam still
shows as sitting in "inbox", marked as read, and intermingled with all
the non-spam email. (I'm guessing "Junk" is some kind of virtual folder
or something?)

Is there some way to make Evolution do something else with the junk?
E.g. move it somewhere else? (If it matters, this is Evo 2.22.3.1, but
will upgrade to Evo 2.24.3 very soon).

To solve this, I would go: Edit -> Preferences -> Mail Preferences ->
Junk -> and tick "Delete Junk messages on exit [every time]", except
that I presume that this will stop the Junk filtering getting better?
Normally I like to keep all the spam I receive so that if I ever have to
retrain a spam filter, I can say "here, this folder, it's all the spam I
have ever received, so learn that this stuff equals bad".

Is there some way to keep the spam (maybe move it to local spam folder)
for filter training purposes, whilst keeping the IMAP folder clean of
junk, and not reducing the quality / learning of the automatic spam
filtering?

-- All the best,
Nick.