"Also apply filter to matching messages"
Checking this box in a Gmail filter ONLY works when creating or editing a filter. The box apparently gets un-checked subsequently. I have a need for a filter to be applied EACH time Gmail is invoked. How can I accomplish this without going through a "pretend" filter edit each time?
Best Answer
The filters are only applied to incoming messages.
One way to use a simple filter all the time is to use the Multiple inbox setting. Wiith multiple inboxes you can display 5 other queries as a separate inbox view.
Under settings/inbox change inbox type to "multiple inboxes". You can then put the logic of the filter you want in the definition of the section. I don't know how complex the query can be.