The downloaded version of Pinjo is fully functional. This version adds a short text in the body of every E-mail message, but there is no time limit in using it. If you want to test Pinjo without the text in the body, a temporary license key is required. For a license key you need (one of) the IP numbers of the server Pinjo will be running on. That particular IP number can be found in the About Box.
A free 30-day license key can be requested here by entering the following fields.