EnigMail

Enigmail is a seamlessly integrated security add-on that allows users to encrypt and digitally sign emails using the OpenPGP standard. Key features include encryption and decryption of messages, digital signing, and verification of received messages. Technically, Enigmail is built on the OpenPGP standard and can be freely used, modified, and distributed under the terms of the GNU General Public License. Use cases for Enigmail include secure communication with colleagues, partners, or friends, and it is particularly useful for sensitive or confidential information. A unique differentiator of Enigmail is its simplicity and ease of use, making it accessible to a wide range of users. By using Enigmail, users can ensure that their emails are protected from unauthorized access, much like sending a letter in a sealed envelope rather than a postcard.