CommuniCrypt Mail Standalone POP3/SMTP eMail client with built-in strongest asymmetric Public-Key-Encryption with RSA encryption algorithm (RSAES-OAEP).Key length for encrypting up to 7120 bit.
CommuniGate Pro Community Edition CommuniGate Pro is a Unified Communications Server Platform that provides secure and reliable e-mail, collaboration, IM, VoIP, mobility and rich media within a single solution. Free for up to 5 users.