In SmarterMail v5 (Version 5), you may activate your SmarterMail v5 License by following step.
1. Log into the SmarterMail webmail interface as the SysAdmin.
2. After login to the SmarterMail v5.x.
3. Click Settings.
4. Click Activation.
5. Click Activate Product.
6. Click Enter Lisence Key.
7. Enter your SmarterMail v5 License Key.
8. Click Next.
9.Enter your E-mail address and password.
(This E-Mail address and password are the ones associated with your SmarterTools account.)
10. Click Activate Now.