We’ve just rolled out a change that now always makes the “Secure Login” button the default login method. This means that your login will be done over an https:// secured connection and your login credentials and the entire session will be encrypted end-to-end. This also means that after your first login, the next time you go to www.fastmail.fm, you’ll automatically be redirected https://www.fastmail.fm from the moment you arrive.
For the moment, we’re leaving the regular “Login” button as well as a fallback in case anyone has problems. We’ll monitor to see if there’s any issues (it’s why we’re not immediately redirecting to https:// just yet), and hopefully we’ll remove the regular “Login” button soon, and change things so we always do a redirect to the https:// site immediately at first access.