Love the social feeling of UX. I screen through 100s of emails every day and if you are interested in some pointers for potential uses I would die for on our current corporate set-up...

Visual ques that are extracted from the email context -Due in 3 days >> has a timer with a 3 day countdown -Urgent- action immedaitely >> adds an urgency mark to the email

Emails that can get diarized, then brought back up automatically -Follow up when client is back form their trip >> sorts email into folder, but brings it back up when the date comes

Assign emails like tasks -X action need to be done by another person but you need to provide oversight >> tag the team or person and get notified when actioned or not actioned

Best of luck!