Mailjet 2FA: how to set up an authenticator app
By the Novaz team · Updated October 29, 2026
Novaz steps checked against version 1.0.5
On this page
Mailjet, the email sending service from Sinch, protects your account with an optional second step: a 6-digit code from an authenticator app, asked for every time you sign in. Mailjet's help doesn't describe text-message codes. It also adds two limits worth knowing before you start (Mailjet):
- 2FA is for the primary account only. If someone works in your account through account sharing, Mailjet recommends they create their own Mailjet account and turn on 2FA there before you share access.
- It's 2FA or SSO, not both. An account can't use two-factor authentication and SAML single sign-on at the same time (Mailjet).
Mailjet recommends 2FA but doesn't require it for normal use (Mailjet). If your account was compromised, though, turning it on is one of the steps Mailjet asks you to finish before support re-enables the account (Mailjet). This guide uses Authenticator App - Novaz on iPhone, but any authenticator app works the same way.
How we checked this guide: the Mailjet steps come from Mailjet's own help center, including the screenshots in its 2FA article, which we read on October 21, 2026. We haven't tested them on a Mailjet account, so a label may differ slightly. The Novaz steps are checked against the app, version 1.0.5.
Turn on 2FA with an authenticator app
Mailjet's 2FA article describes these steps (Mailjet):
- On the Account Information page, under Account settings, select Two-factor authentication.
- Select Configure One-time password. A window called Activate One-time Password authentication opens with a QR code.
- In Novaz, tap +, then Scan QR code, and point the camera at it. If the QR code is on the same iPhone, take a screenshot, tap +, then Choose a photo. See scanning a QR code on the same iPhone.
- Under the QR code, Mailjet also shows a setup key you can type in instead. In Novaz, tap +, then Enter key manually, type Mailjet as the Service and the key as the Setup key. The key in Mailjet's screenshot is 16 characters, which Novaz accepts. See What is a 2FA setup key?
- Select Next. Mailjet now shows your recovery keys (next section). Use Copy, or turn on Show recovery keys to read them, and save them before you go on.
- In Two-factor authentication code, type the 6-digit code from Novaz and select Next.
Confirming the code signs you out and clears your other active sessions. Select Log in to Mailjet, sign in with your password, and type a fresh code from Novaz to finish.
Mailjet's text and screenshots differ slightly (the recovery keys window shows Close, not Next), so expect small label changes.
Save the recovery keys now
Mailjet gives you 10 recovery keys of 10 characters each, and shows them only once, during setup. Each key works once. They're case-sensitive and Mailjet says to type them in capital letters (Mailjet).
Unless you've made a Novaz backup (iCloud backup or a backup file), its keys exist only on your iPhone, so these recovery keys are your way back in if the phone is lost. Store them offline, on paper or in a password manager that isn't on the same phone.
You need two keys to get rid of 2FA without your phone: one to sign in and one to turn it off. Mailjet suggests making a new set when you're down to three or fewer. Go to Account settings > Two-factor authentication, find Available recovery keys, and select Generate new keys. Your old keys stop working. More in 2FA backup codes.
If Mailjet rejects your code
Be careful with repeated tries: after 6 wrong codes in a row, Mailjet locks the account for 5 minutes, and each further try adds another 5 minutes (Mailjet).
Mailjet doesn't list causes. The usual one is the iPhone's clock: open Settings > General > Date & Time and turn on Set Automatically. Novaz also warns you when your clock is 15 seconds or more off. Other causes are in Authenticator code not working?
Changing phones
Mailjet's help doesn't describe moving 2FA to a new phone. It does document turning 2FA off and on, so while you still have the old phone, turn 2FA off with a code and set it up again on the new one. If you have a Novaz iCloud backup or backup file, you can restore the account on the new iPhone instead and skip the reset. See How to transfer your authenticator app to a new iPhone.
If you lose your authenticator
Type a recovery key where Mailjet asks for the code. Then go to Two-factor authentication, turn it off with a second recovery key, and set it up again on your new phone.
The sign-in screen in Mailjet's screenshot has a Lost code generator? link, but the help center doesn't explain where it leads or how Mailjet checks your identity without recovery keys. Its own warning is blunt: without the keys, you'll be locked out. The login page also has a Contact us link for Mailjet support (Mailjet). More in Lost the phone with your authenticator app?
Turning 2FA off
Go to Account settings > Two-factor authentication and switch off One-time Password under Factors. Mailjet asks for a 6-digit code or one of your recovery keys (Mailjet). Then remove the Mailjet account from Novaz: open it and tap Remove account.
