I wasn't aware that Airmail was created by any of the PC vendors? I thought a bunch of computer geeks put it together.
That said, if the geeks put it together for the Mac I'm still conviced it would work better. Almost 50% of the time I have some weird quirk with it.
And BTW Apple doesn't code FireFox, DreamWeaver, PhotoShop, VLC, etc. I don't think I've had an issue with any of those aftermarket products on the Mac in the last 6 months to a year.
Go Slow
Sail Far
Stay Long