I wanted to have a way of accessing parts of my email account from untrusted machines (e.g. from an internet cafe while on vacation). I didn't find a simple way

I wanted to have a way of accessing parts of my email account from untrusted machines (e.g. from an internet cafe while on vacation). I didn't find a simple way to do this, so I wrote my own tool. It's a python/flask/gevent based server and a very minimal read-only frontend to display mails. It only allows access to a configured set of mailboxes using one times passwords or a YubiKey. Feedback welcome.