I'm one of the people who were experiencing Apple Mail on Mac opening up randomly on it's own. I switched to Spark for awhile but wasn't a huge fan of their UI. Once I heard about Edison Mail on here, I decided to download them and give them a try. Last week I had two weird situations where I got random emails with verification codes as if I was trying to reset my password or reactivate an old accounts. After reading this article, I decided to remove my accounts off Edison Mail and go back to Apple Mail. I really loved their UI, but privacy/security comes first.