When a new mail is received if a filter marks it as read, there should be no notification for that email. The email is marked as read automatically, usialy because the user does not want to know about it.
Also there should be no notification if the mail is moved by the filter to a folder that was set not to act on new mail.

I'm not sure, but this could also apply to deleted emails.

Reproducible: Always

Steps to Reproduce:
1. Set kmail to show notifications on new mail.
2. set a filter to mark mail as read or move to a folder marked not to act on new mail
Actual Results:  
Notification is shown for all received emails

Expected Results:  
Notifications should not aprear on emails that the filters marked as read or moved to a folder marked not to act on new mail.