2FA methods supported by Fastmail
Adding two-factor authentication is one of the most effective ways to protect your Fastmail account. With TOTP support, you can generate Fastmail verification codes directly in the Authenticator App.
SMS
Fastmail can send a one-time verification code to your phone via text message.
Authenticator app (TOTP)
Fastmail lets you use time-based one-time passwords, so you can generate verification codes in an authenticator app on your device — no network or SMS needed.
Hardware token
Fastmail supports a dedicated hardware token for generating codes.
Security key (U2F)
Fastmail works with hardware security keys using the U2F/FIDO standard.
Setup requires SMS verification.
Fastmail 2FA — Frequently asked questions
Does Fastmail support an authenticator app?
Yes. Fastmail supports time-based one-time passwords (TOTP), so you can add it to the Authenticator App and generate verification codes right on your device.
Which two-factor authentication methods does Fastmail support?
Fastmail currently supports: SMS, Authenticator app (TOTP), Hardware token, Security key (U2F).
Is it free to generate Fastmail codes with the Authenticator App?
Yes. The Authenticator App is free to download, and generating Fastmail verification codes does not require an account or sign-up.
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