Tip: View unread mails in Gmail
When you’re subscribed to many mailing-lists, you often have hundreds of mails a day that you don’t even bother reading. So usually, you mark them as read. But if you’re like me and that your using tags as folders and sort all incoming mailing-lists in those folders, when you want to mark all mails as read, you need to go to each label and select them all, mark them as read each time.
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