Is there a "play by post" mode?

I loved HOMM back in the day, but only ever played split screen.

Me and my wife are currently long distance, so we want to play this game together, and it'd be ideal if we could "play by post" - meaning we each take a turn when we have time, and then send to the other. It'll probably take weeks if not months to finish a game, but that's actually kind of the point for me.

So is this possible?