Tutanota

Tutanota is a secure email service based in Germany that offers end-to-end encryption for all your communication needs. With Tutanota, you can send and receive encrypted emails on all devices using their open-source email client, mobile apps, and desktop applications. The company's name derives from the Latin words "Tuta" and "Nota," meaning "secure" and "message," reflecting their commitment to providing a safe and confidential email experience. Tutanota caters to individuals as well as businesses, ensuring GDPR compliance and data sovereignty. Their encryption methods, including symmetric (AES) and asymmetric encryption (AES/RSA), protect your entire mailbox, including the address book. Tutanota's services are widely trusted by those who prioritize privacy, security, and confidentiality in their email communication.

https://tutanota.com/