Previous Recipients crud

This week I come up with a very handy feature of Mail.app, an obvious one, that it seems to be already posted ad infinitum, but I'll add it ad a place holder.

Mail.app keeps tabs of all the email addresses it has sent a message in any given time. To view a list of all of them, goto:

Window menu > Previous Recipients

Mine had whole bunch of email addresses, a lot of them really useless.