It would be great to see sent e-mails flagged or forwarded to a certain e-mail folder, if they were sent to someone or contain a trigger word or reference for following up on them. Outlook.com
Add Outlook Trigger for "when an email is sent" is also essential for when I send on behalf of my O365 Team, using the O365 Groups email address. Currently, there is no way do trigger on these (outside of exchange side email flow) that I am aware of.
I track my time spent all day. It would be helpful to have a list of all the emails I sent out during the day with the Subject, To, cc, Sent time. I could then add the duration of time spent drafting the email to make it a time entry. I could program excel to put in a standard time entry like .3 hours (18 minutes) and then change it to be longer or shorter depending upon my notes, memory or best guess.