This license allows you to install and use the software on a single computer inside your organization. MailCarrier is priced according to the number of mail address that you have.

Upgrade Policy provides one year of FREE upgrades. Throughout the duration of the Upgrade Protection period, receive all releases of MailCarrier free of charge, whether the release is minor or major.
Upgrades can be purchased at any time after Upgrade Policy expires. The fee is 15 percent of the list prices.