Having a Gmail account, some of the Gmail folders like 'All' or 'Important' store duplicate versions of the mail received in the inbox. The problem is that each time that I get a new mail, it appears as unread in all those folders, so I got to manually mark them as read.

Even if these folders content duplicate versions of the messages, I'm interested in having those folders available locally because that permets me to quickly search old mail (typically mail stored using Gmail's 'Archive' feature. 

One possible solution would be to include an 'Automatically mark as read all messages in this folder' option. I've actively searched this option, even in the filters, and not found it.

Thank you for your time,
Néstor

Reproducible: Always