If you use Gmail, know that "human third parties" are reading your email https://boingboing.net/2018/07/03/if-you-use-gmail-know-that.html #termsofservice #Post
Could be. IF you signed up for a service and have it permissions to... Bad enough, though, if you thought ONLY machines could read it!
For secure, use actual postal mail (no one messes with the IRS or the Postmaster General!)
I wish there was a much easier way to send and receive encrypted email.