Officially: In Gmail, you can add a letter before you send the label and the label!

Oh, those piles of letters that come to my e-mail daily! . I want to be a John, sent an emergency letter in my mailbox. Gmail. message with an embedded part of the essay on. waveguides. Your humble servant, wrote him a letter with this request and waits for an answer, which comes after a couple of minutes. But the thing! . ' Unread '. there were a few new ' doves ', but other subjects: news, personal, and so on. Yes, even I had forgotten that in addition to all of these reasons in my Gmail inbox appeared the next portion of subscriptions to news. Xperia S. ! .

Just when you create a new letter, give it a label, such as. ' Education '. and add a colorful tag! . ' Education '. Where it is very easy to find. In my opinion this option is quite handy, since I always forget to add one or the other label to the letter, and then I can not find the right!.

By the way, the recipient of your letter will never know about the newly assigned ' labels '. Since this is strictly your personal preference, the designation.