Stunnel

Stunnel empowers you to encrypt communications for services like POP2, POP3, IMAP, and more using the trusted OpenSSL library. This SSL wrapper supports all OpenSSL cryptographic algorithms and can utilize the FIPS 140-2 validated OpenSSL FIPS Provider for enhanced security compliance. Cross-platform by design, it works with inetd daemons and standalone servers effortlessly, and the Windows installer includes the FIPS Provider out-of-the-box, making it straightforward to secure your network traffic without complex configurations.