I generally like Fastmail and the for pay model, but their Employee Access to Data section of their Privacy Policy seems to be a bit too cavalier. I may just be naive though.

PP:https://www.fastmail.com/about/privacy.html

Also, I feel they overstate the jurisdiction piece. Being in Australia is important, but it certainly doesn't make you a paragon of privacy or Australia a privacy Eden. Company culture is great, but a five-eyes becoming more surveillance-heavy by the day doesn't make the technical aspects of maintaining private communication any easier. I'd be wary not to oversell.