KMail vs. Proton Mail Comparison Chart

KMail is the email component of Kontact, the integrated personal information manager from KDE. Default settings rather compromise on features than security or privacy. 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. Spam protection, so if your email server doesn’t take care of this already, KMail can integrate popular spam checkers such as SpamAssassin or Bogofilter locally.