Downloading Eprivo 1.4.2 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within Communication Tools, more precisely E-mail. The actual developer of this software for Mac is BlueRISC Inc.
From the developer:
EPRIVO lets you secure all your accounts for encrypted e-mail with privacy controls. The application allows future control in both recipient devices and cloud. Also, it enables you to send voice and text e-mails using your existing e-mail addresses and maintain control over sent private e-mails forever. It is ideal for secured communication for employees working remotely and consumers.
You may want to check out more Mac applications, such as PageSender, Mail to ToDo X or Yahoo! Mailer, which might be similar to Eprivo.