Not the best advice I can give you. Spark mail client, what looks really beautiful on the outside hides a lot of sorrow underneath, if only you find the time to go through their T&C’s, 2-3y ago when I checked, there was a clause there that was saying they’re allowed to download ALL your emails — which to me is a mental breach to privacy.
I’ve arrived at an age that beautiful UI/UX does not sell it for me anymore unless I get privacy — privacy on should be default IMO; but sadly, we live in a world where this became tabu nowadays… which is quite unfortunate. Personally I just stick with Apple Mail; I receive emails, I can reply back, it’s private enough — enough for me.