http://avaejcviyyfopclfy7ynllif2e5g4wmdfuo6tmbrhg34avfuonqee5ad.onion/Email.html
Notes from the above table: a - Present but not free, has no known APAY scheme, thus marked N. b - Possible with HttpsEveryWhere. c - Works, but uses a self signed, expired, or otherwise deviant, certificate. d - Gmail has a cleartext session leak with the splash page after signup (welcoming the new user to their mailbox one click away).