Exim 4.66 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Exim 4.66 reached end of life on 18 Apr 2007. It no longer receives security fixes.
7,053 days without security patches
Recommended action: upgrade to Exim 4.99. Support timeline
Official dates from the Exim release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 8 Jan 2007 | — |
| End of life | 18 Apr 2007 | 19.3 years ago |
| Latest release | 4.66 · 8 Jan 2007 | final |
Where to go from 4.66
Recommended target: Exim 4.99.
The newest actively supported branch is Exim 4.99 (latest release 4.99.1).
Frequently asked questions
Is Exim 4.66 still safe to use?
Exim 4.66 reached end of life on 18 Apr 2007, 7,053 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Exim 4.66?
Yes — the final release (4.66) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Exim 4.66 to?
Upgrade to Exim 4.99, the newest actively supported branch.
All Exim versions
4.99 supported 4.98 EOL 2025 4.97 EOL 2024 4.96 EOL 2023 4.95 EOL 2022 4.94 EOL 2021 4.93 EOL 2020 4.92 EOL 2019 4.91 EOL 2019 4.90 EOL 2018 4.89 EOL 2017 4.88 EOL 2017 4.87 EOL 2016 4.86 EOL 2016 4.85 EOL 2015 4.84 EOL 2015 4.83 EOL 2014 4.82 EOL 2014 4.80 EOL 2013 4.77 EOL 2012 4.76 EOL 2011 4.75 EOL 2011 4.74 EOL 2011 4.73 EOL 2011 4.72 EOL 2010 4.71 EOL 2010 4.70 EOL 2009 4.69 EOL 2009 4.68 EOL 2007 4.67 EOL 2007 4.66 EOL 2007 4.65 EOL 2007 4.64 EOL 2007 4.63 EOL 2006 4.62 EOL 2006 4.61 EOL 2006 4.54 EOL 2006 4.53 EOL 2005 4.52 EOL 2005 4.51 EOL 2005 4.50 EOL 2005