Mark an email like "Awaiting response" when it's sent
This will allow us to remember which emails we are waiting for to be answered, and track them from the same email.
SImilar to this: https://www.youtube.com/watch?v=lBaoK32y4gk&feature=emb_title
Jeffrey Coleman commented
I use Catagories to do this. However a dedicated feature designed for the purpose would be excellent, including the option to remove it from the inbox temporarily. It should be integrated with the missing SNOOZE feature (that OWA has that Outlook Desktop is still missing).