This info might be helpful for many of us who has to go through a lot of mailsIn Gmail, every built-in view (inbox, trash, read mail) is actually a label. And since Gmail doesn't use folders, if you use the service, you'll end up searching a lot. For example, to view all the unread messages from the inbox, you search for label:inbox label:unread. To create more involved queries, you can combine the built-in labels with the labels you assign. But such queries can become long and hard to write. Fortunately, you can replace the word label with l and everything will still work fine. The previous query will become: l:inbox l:unread.
That query still too long? Great news: Gmail has shortcuts for the special labels:
^b chats
^f sent mail
^i inbox
^k trash
^r draft
^s spam
^t starred messages
^u unread mail
That means our query could become: l:^i l:^u. What about all the unread messages that aren't in the inbox? Search for: -l:^i l:^u..
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