2FA methods supported by T-Online
Adding two-factor authentication is one of the most effective ways to protect your T-Online account. With TOTP support, you can generate T-Online verification codes directly in the Authenticator App.
SMS
T-Online can send a one-time verification code to your phone via text message.
Authenticator app (TOTP)
T-Online 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.
SMS 2FA is always required
T-Online 2FA — Frequently asked questions
Does T-Online support an authenticator app?
Yes. T-Online 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 T-Online support?
T-Online currently supports: SMS, Authenticator app (TOTP).
Is it free to generate T-Online codes with the Authenticator App?
Yes. The Authenticator App is free to download, and generating T-Online verification codes does not require an account or sign-up.
More Email services that support 2FA
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