I'm not sure if this has been addressed in the past.
I wanted to refer to an earlier email but couldn't recall when I had received it. I had to review every page of my archived messages and in the end found out it was more than a year old and had been deleted.
I would like to have the ability to sort all received emails by sender's name. It would make finding an email received within the past year easier to find. It would also make determining if an email had been deleted easier. This is especially true for authors who receive a high number of emails.