Arrow icon showing when you replied to a message
When you forward an email from your inbox, an arrow shows next to that message showing that you forwarded that message, but when you reply to a message, there's no arrow. I consistently forget if I responded to an email and then have to search through my sent items to see if I replied or not.
Nate H shared this idea
Tony D commented
This seems to be fixed now - Shows up in Airmail 3