at the risk of asking for ManicTime to have too much tie-in with a single app, it would be helpful for tagging if it also showed the sender and recipients, as subject lines are often vague. Would also be good to see the folder and outlook categories applied.

I'm not sure how this could be dealt with in a more generic sense (displaying "additional info" columns for a particular app), but maybe worth doing given the widespread use of Outlook.

Also would be nice to be able to open an email by clicking it from ManicTime (if I can't remember what it was for).

This is something that I thought would also be very useful. The way the application currently works with Outlook is good but it could be much more powerful in terms of flagging emails from certain senders, domains, recipients, etc.