[Users] filtering appears not to work properly

[Paul]

On Fri, 29 Dec 2023 11:57:52 +0100
Slavko <linux at slavino.sk> wrote: 

> I will guess, that this CM's filters behavior is inherited from POP,
> where no multiple access was/is expected (but possible, i used it years
> ago).

No. CM has always had support for IMAP and POP. Wrong guess.

> IMO, the CM have to maintain its own (New for CM) state, to apply
> filters on any message, which it see first time, not only to IMAP's new
> messages. That can "fix" behavior not only for multi device access with
> compliant IMAPs, but for broken too

If CM was to maintain its own state for IMAP msgs that would break IMAP. It
is only 'safe' to automatically filter New messages as otherwise these
could/will have been filtered previously, and then previously filtered msgs
would be wrongly filtered again. That would be quickly be really irritating,
imo. Fortunately, filtering can be run manually for ultimate flexibility,
allowing the user to achieve what is required, and negating the need for your
idea. There is also folder Processing, of course, for even more possibilities.

with regards

Paul