Multiple IMAP Mailboxes and one collection folder

Hello,

we use many IMAP folders and now we are searching for a way to display all mails inside this folders in one collecting folder.

The advantage for us would be the possibility to view all new incoming mails in one folder. It would be possible to use the standard MAIL App on the iOS without problems.

I could simply make a copy of all mails in one folder with Sieve, but then the Per-user Seen Flag would be useless, because the mail inside the folder is still unread.

Is there a way to show some way of collecting folder for every user?

Thanks

Dieter