When I get replies to a message, I go to check the details of what I wrote. So I go to the sent items folder, and only a few messages from 2014 are there. There missing? But I have been sent a few personal messages this week.
And shouldn't it be in the message I just received. Because when you reply to an email, what you wrote is there. That way, you don't have to go back, to see what you wrote.