Earlier quoted context omitted.
Just a reminder to everybody that Fastmail is an Australian company, and is therefore subject to Australia's TOLA / Assistance And Access. I avoid them like the plague for this reason. Having your e-mail provider compelled to work against your interests is no joke and you may not want to be in that situation.
Maybe it's just me but I don't have "Australia going to force my email provider to hand over my data" in my threat model. It's probably worth thinking about that too before hastily switching email providers. Fastmail is a solid provider, with great support and I never had a real issue with them. I give them money, they provide me a good and stable email service.
"Australian intelligence services decline to comment on massive data breach."