...End-to-end Encryption. Support for OpenPGP and S/MIME is built-in, and a setup and key generation wizard aids users in getting started with this. Transport encryption, SSL/TLS encrypted communication is of course supported, as are a number of authentication methods such as GSSAPI (Kerberos) or OAuth2. Strong isolation of HTML content. If HTML emails can’t be avoided, KMail ensures no external references can be hidden in there to leak information or compromise your privacy. Additionally KMail’s phising protections warns about suspicious links in such emails. ...