Best Email Client tools

Add email encryption while keeping an existing address

A plugin-based mail client with PGP and S/MIME support

A command-line mail client that accepts prepared encrypted messages

A keyboard-focused Mac mail client with OpenPGP and S/MIME

A mail client with integrated PGP and S/MIME key workflows

GNOME mail with documented GPG and S/MIME workflows

Terminal email with PGP and several mailbox backends

An open-source email client funded by user donations

Android mail with explicit image, link and encryption controls

A terminal mail interface with PGP/MIME and a Notmuch index

KDE mail with OpenPGP, S/MIME and contact-based crypto preferences

A terminal mail client with GPG signing and encryption

Email-client tracker controls with PGP and S/MIME options

A Mutt-derived terminal client with documented encryption configuration

A terminal mail client with PGP/MIME and extensive configuration

A maintained Thunderbird fork with encrypted-message search