[terminalbraid]

It's what I use and it meets all your requests except maybe the hotkeys.

[gabeyaw]

Ok, I'll have a look. Mac OS lets you change the hotkeys in the menubar anyway, so not a back idea

[Jeremy1026]

I use default Apple Mail. It meets points 1, 2, 4. 3 can be somewhat configured like you said.

[gabeyaw]

Thanks for the suggestion