The built-in encryption guarantees that your mailbox belongs to you: Nobody can decrypt or read your data. Tutanota is open source so security experts can verify the code that protects your emails. Our Android app is Google-free making Tutanota the best open source email service. With apps for iOS and Android, your secure emails are available

Best open source email security products | Network World CipherMail email encryption gateway. The community version of CipherMail is open source software that can be installed on most versions of Linux. It runs on Java and requires Postfix and Tomcat 10 Best Encryption Software For Windows 10 of 2020 - Viral Hax Apr 18, 2020

Roundcube a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an email client, including MIME support, address book, folder manipulation, message searching and spell checking.

Top 5 Best Free File Encryption Software for Windows

5 Best Free PGP Encryption Software For Windows

cryptography - How is open source encryption safe? - Open In 21st century encryption, the only secret is your password. Even non-open source programs use algorithms that are public. The strength of encryption lies in the ability to protect data using only your password. Cryptographer Bruce Schneier explains: Every secret creates a potential failure point. OpenPGP is the most widely used email encryption standard. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF) as a Proposed Standard in RFC 4880. OpenPGP was originally derived from the PGP software, created by Phil Zimmermann. The modusCloud software suite is SaaS software. modusCloud is Anti-Spam software, and includes features such as anti spam, anti virus, email attachment protection, and encryption. modusCloud offers a free trial. Some competitor software products to modusCloud include SolarWinds Mail Assure, ContentCatcher, and Xeams. ☞ Mailvelope is a software that uses the asymmetric public-key encryption, and follows OpenPGP standards, the open-source privacy standard for encryption worldwide, which is compatible with all kinds of email.