sms would be nice, even if it isnt OTP. Also, I have had troubles with mailbox
OTP is clunky. Using a camera on my phone to scan a code to get a number, to enter a number. Managing the OTP software, profiles and having no offline backup of QR codes on redhats app and having Google have all the QR codes instead on their app. Having the camera app running in the background etc.. Some people might be okay with it im sure.
I have tried twice to setup an account (trial account) and each time i am having difficulty in the password setup (it might be user error i admit). I enable OTP properly and yet on logging out and back into the account i am presented with only with a normal password entry ( which fails ). I also had a database error message when i created my first account :/
I will try again soon, but an SMS option is easier.
i have a suggestion, if you do use SMS it might be cool to somehow use the ability to send encrypted texts to SMSsecure,Signal,Silence etc.. users, that would remove the potential for harm for mobile email users using SMS dual authentication.
edit* obviously this form worked for submission but my login does not on the main page.