E-mail: Encryption with PGP

Kolab has configured Perfect Forward Secrecy (PFS), data in transport is encrypted with SSL/TLS, and all systems are HMS encrypted. The web client provides the option of encrypting emails through PGP asymmetric keys . As other similar solutions, e.g. the use of browser add-ons like Mailvelope, the webclient is letting the server hold a copy of the public / private keys, which brings another level of security considerations into play. Providing true end-to-end encryption can only really be achieved by client encryption.