WARNING. This article is NOT for the faint of heart. Or for the helpless email hoarder. Or the person who uses their Inbox as their sole filing system.
But for the rest of us who struggle with email management, an email Inbox is a repository for valid mail mixed with newsletters, vendor adverts, CC's, and messages so old you will never act upon them. Last week, my Inbox had over 1,000 emails in it with over 600 UNREAD. These emails ran back to my current Inbox archive limit of three months. Sure, occasionally I would use the search function to find a message from a conversation or person. But for the most part, the reason I needed to keep older messages was that I didn't act upon the email when it was fresh and most relevant.