Earlier quoted context omitted.
where are your servers located?
USA, with backups in Canada (we're a Canadian company). But the whole point is that not even us, with full server access, should be able to access your data (even under subpoena) so using third-party servers close to where we expect most of our users to be shouldn't raise any eyebrows. We would eventually like to offer multiple options for server location, but that isn't feasible in the short term.
I know you preach encryption, but there is a lot that can still be subpoenad outside of the encrypted message payloads, such as login IP addresses, destination email adresses, frequency of messages, etc.