Two-Factor Authentication (2FA) is required for all MaraPool accounts. By default, your account will have email 2FA enabled. Supported 2FA options are email, SMS, or QR code. You change your 2FA method in your account settings. The email and SMS options utilize a one-time passcode that is sent to the device on file after valid credentials are entered. The QR code requires a virtual multi-factor authentication (MFA) smartphone app, such as Google Authenticator.