MailX3 - Version 2.0.17 MailX3 uses advanced encryption key technology to protect sensitive information. As a Microsoft Outlook plug-in, stand alone Windows product, or html web version, MailX3 makes advanced email protection simple. It is an immediate, low-cost, highly effective solution within the marketplace. Free client viewers and web-based versions make MailX3 easy to use. All encryption occurs exclusively on each individual's computer with all network transmissions occurring within existing email pathways, so security is maintained at the highest level. The latest version employs PKI technology, RSA encryption, offline creation mode and much more.