Running kmail with having a Google Mail account (many tags which mail gets automatically sorted to) and a local company IMAP server (cyrus, server sided filtering, large amount of folders as well), I am at the moment "suffering" from having "new message" notification in my kmail tray icon as soon as there are new messages in _any_ of all these hundreds of folders. Via kde mailing lists I learnt that this behaviour can be disabled on a per-folder basis but obviously indeed this _has_ to be done manually for each folder in question.  

It would be nice to have a global kmail configuration option restricting new message notifications in the tray icon only to these folders listed as "favorites" / "preferred folders". 

Reproducible: Always