| Version | Change log |
| Stunnel 5.73 Sep 9, 2024 |
Security bugfixes: OpenSSL DLLs updated to version 3.3.2. OpenSSL FIPS Provider updated to version 3.0.9. Bugfixes: Fixed a memory leak while reloading stunnel.conf sections with "client=yes" and "delay=no". Fixed TIMEOUTocsp with values greater than 4. Fix the IPv6 test on a non-IPv6 machine. Features: HELO replaced with EHLO in the post-STARTTLS SMTP protocol negotiation (thx to Peter Pentchev). OCSP stapling fetches moved away from server threads. Improved client-side session resumption. Added support for the mimalloc allocator. Check for protocolHost moved to configuration file processing for the client-side CONNECT protocol. Clarified some confusing OpenSSL's certificate verification error messages. stunnel.nsi updated for Debian 13 and Fedora. Improved NetBSD compatibility. |
| Stunnel 5.72 Feb 5, 2024 | |
| Stunnel 5.71 Sep 19, 2023 | |
| Stunnel 5.70 Jul 12, 2023 | |
| Stunnel 5.69 Mar 4, 2023 | |
| Stunnel 5.68 Feb 7, 2023 | |
| Stunnel 5.67 Nov 1, 2022 | |
| Stunnel 5.66 Sep 11, 2022 | |
| Stunnel 5.65 Jul 18, 2022 | |
| Stunnel 5.64 May 8, 2022 |
