Apple Mail not auto saving drafts
I am running High Sierra using Apple Mail with an exchange email account.
When I am writing an email, I find it is not saved to the drafts folder unless I do so myself.
If I quit Mail with an email in progress, I lose it. When email relaunches, a blank email opens for each email that I was working on.
Question 1: Does Apple Mail on High Sierra auto save work? I am running Mailtags plugin.
Question 2: Is there a way to check when I quit Mail to see if more than 1 window is open in Mail and if so, allow me to cancel the quit?
Sure. No problem. It does sound like you need to get to the bottom of the crashing problem with AppleMail.app as that really is a problem. You might want to try and reinstall macOS over the top of your current install and see if that fixes it. It has been my experience that AppleMail.app is quite stable so the crashing issue should be something that can be tracked down.
Glad to hear that the drafts folder is in the correct location and that as long as you save your drafts they are saved to the server and you can see them on all of your other devices.