Secure mail client

A secure mail client is a software application that allows users to send and receive emails while ensuring the confidentiality, integrity, and authenticity of the messages. Here are some popular secure mail clients:

  1. ProtonMail: A free, open-source email service that uses end-to-end encryption to protect user emails. It's based in Switzerland and has a strong focus on privacy and security.
  2. Tutanota: A German-based email service that offers end-to-end encryption and zero-knowledge proof, ensuring that only the sender and recipient can read the emails.
  3. Mailfence: A secure email service that offers end-to-end encryption, two-factor authentication, and a built-in password manager.
  4. Gmail with PGP: Google's Gmail service can be used with PGP (Pretty Good Privacy) encryption to secure emails. You can use a third-party plugin like Mailvelope or PGP Mail to enable PGP encryption.
  5. Thunderbird with Enigmail: Mozilla's Thunderbird email client can be used with Enigmail, a plugin that enables PGP encryption and signing of emails.
  6. Microsoft Outlook with S/MIME: Microsoft's Outlook email client can be used with S/MIME (Secure/Multipurpose Internet Mail Extensions) encryption to secure emails.
  7. OpenPGP: A free and open-source email client that uses PGP encryption to secure emails.
  8. Cryptomator: A free and open-source email client that uses end-to-end encryption and zero-knowledge proof to protect user emails.
  9. Mailvelope: A browser extension that enables PGP encryption and signing of emails in popular email clients like Gmail, Yahoo, and Outlook.
  10. PGP Mail: A plugin for various email clients, including Gmail, Outlook, and Thunderbird, that enables PGP encryption and signing of emails.

When choosing a secure mail client, consider the following factors:

  1. End-to-end encryption: Ensure that the client uses end-to-end encryption to protect emails from interception and eavesdropping.
  2. Zero-knowledge proof: Look for clients that use zero-knowledge proof to ensure that only the sender and recipient can read the emails.
  3. Two-factor authentication: Choose a client that offers two-factor authentication to add an extra layer of security to your account.
  4. Open-source: Consider using open-source clients that are transparent about their code and security practices.
  5. Privacy policies: Review the client's privacy policies to ensure that they respect user privacy and do not collect unnecessary data.

Remember that even with a secure mail client, it's essential to follow best practices for email security, such as using strong passwords, enabling two-factor authentication, and being cautious when clicking on links or downloading attachments.