Two-factor authentication
Two-factor authentication increases security by requiring you to enter a one-time code, in addition to your username and password. The code is delivered by an app on your personal mobile phone or computer. For Valimail, the supported two-factor authentication app is Authy.
Enable Two-Factor Authentication
Click Enable Two Factor Authentication.
Enter your country.
Enter your mobile phone number.
Click Enable.
Copy the token number from the SMS message on your mobile phone or the Authy app and enter it.
Click Enable my account.
Authy app
You can download the Authy app to your phone or use the plug-in in your browser. The app provides a time-limited token that you enter or copy when signing into Valimail Enforce. Instructions for installing the Authy app on your browser or mobile phone can be found on the Authy home page. (authy.com)