I created a new small action that allows you to send the current draft to Fastmail. I hope someone else finds this useful. 
2 Likes
Nice one. I always wondered about a URL scheme but could never find any documentation to that effect from Fastmail. Nice to see that you don’t actually need the desktop app for it to work, too, with the Fastmail draft popping up in the browser. Thanks for sharing.
1 Like
Thank you. I‘m glad you like it.