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Authenticator app 2FA for email providers

Your email inbox is where password resets for everything else arrive, which makes it the account most worth protecting. These guides cover email providers that accept an authenticator app, including what happens to mail apps that sign in with a password.

Email · 30

AOLAOL needs two recovery methods before it offers an authenticator app, and lists no backup codes. How to set it up, keep mail apps working, and recover.
FastmailFastmail asks for a recovery phone before it lets you add an authenticator app. How to set both up, find your recovery code, and get back in later.
GMXGMX 2FA pairs an authenticator app with one printable secret key, not backup codes. Steps for GMX.com and for GMX.net, which also needs the GMX App.
Google AccountGoogle's 2-Step Verification takes any authenticator app, not only Google's. Where to add one, the wait of up to 7 days, backup codes, and recovery.
HEYOnce you turn on 2FA for HEY email, you can't turn it off. How to set up an authenticator app, save recovery codes, and get back in without your phone.
HushmailAdd an authenticator app to Hushmail two-step verification: where the setting is, the backup code, and the security code mail apps like Outlook then need.
ImprovMXImprovMX 2FA asks for an app code even when you sign in by magic link. Where to turn it on, and why removing it means emailing ImprovMX support.
Inbox.lvInbox.lv two-step verification uses an authenticator app, has no backup codes, and turns off when you reset your password. Setup, recovery and fixes.
mail.commail.com 2FA needs an authenticator app and a verified mobile number, and gives you one secret key instead of backup codes. Setup, sign-in and recovery.
mail.demail.de wants you to write down its 16-character secret code: lose it and your codes, and only an ID card gets you back in. Setup, backup codes, recovery.
mailboxmailbox.org 2FA gives you no backup codes, and a password reset switches it off. Set up an authenticator app, app passwords and a recovery method.
MailfenceMailfence 2FA protects web sign-in only, so mail apps need their own passwords. Set up an authenticator app, keep backup codes, and recover access.
MailjetSet up Mailjet 2FA with an authenticator app: recovery keys shown only once, the shared-account limit, the 2FA-or-SSO choice, and the lockout rule.
MailoMailo 2FA can only be turned on from the web, and there are no backup codes. Set up an authenticator app, trust your devices, and lock down IMAP access.
MimecastMimecast 2FA is switched on by your admin, not by you. How to register an authenticator app at sign-in, why there are no backup codes, and who resets it.
NetEase MailNetEase Mail (163.com) lists Google Authenticator as a verification method, but sign-in checks are a separate switch. Where both are and how to recover.
Onet PocztaOnet Poczta's 2FA lives in your Onet Konto. Set up an authenticator app, save backup codes, add app passwords for Outlook, and know the ID-based recovery.
POST LuxembourgAdd an authenticator app to your POST Luxembourg webmail (@pt.lu): the mobile number to set first, where the switch is, trusted devices, and Reset OTP.
PosteoPosteo 2FA guards webmail sign-in, not mail apps, and has no backup codes. Set it up with an authenticator app, keep the secret key, and recover access.
ProtonOne Proton Account covers Mail, Pass, VPN and Drive. Set up its 2FA with an authenticator app (not Proton Pass), save the recovery codes, and get back in.
RunboxRunbox 2FA switches your mail programs to app passwords. How to set up an authenticator app, make an unlock code, and get back in if locked out.
SAPO MailSAPO Mail's 2FA lives in SAPO ID, needs a recovery contact and doesn't cover IMAP or POP. Where to turn it on, the 30-second codes, and lockout risks.
Seznam.czSeznam.cz 2FA needs a verified phone number and gives no backup codes. How to add an authenticator app, set a mail app password, and use the SMS fallback.
SimpleLoginSet up SimpleLogin 2FA with an authenticator app under Settings, save the one-use recovery codes, and see what SimpleLogin's docs leave out on recovery.
StartMailStartMail gives you one 12-digit 2FA backup code, and losing both it and your app locks you out. Set up an authenticator app and keep that code safe.
Telekom Login (T-Online)Your t-online.de email signs in with the Telekom Login. Add an authenticator app, choose when Telekom asks for a code, and plan for a lost phone.
TutaTuta lists no backup codes: a lost authenticator is reset with your password plus your recovery code. Where to add the app in Tuta and what to save first.
WEB.DEWEB.DE 2FA uses an authenticator app, but setup also needs the WEB.DE Mail App and a verified mobile number. German labels, secret key and recovery.
YahooYahoo hides its authenticator option until your account has a password and two recovery methods. How to set it up, keep mail apps working, and get back in.
ZimbraZimbra mail runs on your employer's or provider's server, so an admin decides if you get 2FA. Where to set it up, one-time codes, app passcodes, recovery.

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