A two-factor authenticator (2FA) is a small mobile or browser app that produces a fresh 6-digit code every 30 seconds. Mailpro asks for that code right after your password, so even a leaked password isn’t enough to break in.
How an authenticator works
When you turn 2FA on, Mailpro generates a secret key — usually shown as a QR code — that you scan into your authenticator app. The app then derives a TOTP (time-based one-time password) from that secret plus the current time. Mailpro runs the same calculation on its side and accepts the code if they match.
Popular authenticator apps
| App | Platforms | Notes |
|---|---|---|
| Google Authenticator | iOS, Android | Simple, no account needed |
| Microsoft Authenticator | iOS, Android | Push notifications, cloud backup |
| Authy | iOS, Android, desktop | Multi-device with encrypted sync |
| 1Password / Bitwarden | iOS, Android, desktop, browser | Stored alongside your passwords |
Why use 2FA on Mailpro
Your Mailpro account holds your subscriber lists, sender reputation and billing details. 2FA blocks the majority of password-based attacks, including phishing and reused-password breaches.
Related questions
Ready to set it up? See how to enable 2FA on Mailpro. Worried about losing your phone? Read do I need my phone for 2FA.
Add a second lock to your Mailpro account
Install an authenticator app, then follow double authentication setup. Activation takes under two minutes.