Stunnel

Stunnel simplifies securing network services by wrapping them with SSL encryption, compatible with daemons like POP3, IMAP, and SMTP. Utilizing the OpenSSL library, it offers broad cryptographic support and can integrate with the FIPS 140-2 validated OpenSSL FIPS Provider for meeting stringent security standards. This cross-platform utility ensures your communications are protected without modifying existing server software, making it an ideal solution for enhancing security across diverse environments, including Windows where the FIPS Provider is pre-included.