Stunnel

Stunnel simplifies securing network services by wrapping them with SSL encryption, protecting data in transit for daemons such as POP2, POP3, IMAP, and standalone servers like SMTP or HTTP. Leveraging the OpenSSL library, it offers a wide range of cryptographic methods and can utilize FIPS 140-2 validation for enhanced security compliance. Its universal compatibility across platforms makes it an ideal solution for adding robust encryption to legacy or unsecured applications effortlessly.