OpenSMTPD Is the Mail Server for the Future
OpenSMTPD is being positioned as the future mail server, particularly as OpenBSD 7.9 will no longer support the exim package. The transition to OpenSMTPD comes after years of maintaining a complex mail setup with exim, which faced security flaws over time. Users are encouraged to adapt to OpenSMTPD, especially given the significant changes in its recent releases.
- ▪OpenSMTPD is developed as part of OpenBSD and is available in a portable version.
- ▪OpenBSD 7.9 will not include the exim package, prompting users to find alternatives.
- ▪The OpenSMTPD 6.4 release underwent a major code overhaul, changing important configuration syntax.
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| Original publisher | Nxdomain |
| Canonical URL | https://nxdomain.no/~peter/time_for_opensmtpd.html |
| Publication time | Mon, 25 May 2026 12:57:29 +0000 |
| Retrieval time | 2026-05-25T13:07:37.303Z |
| Last seen | 2026-05-25T13:07:40.736Z |
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| Summary source text | contentText |
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| Commercial reuse | May the content be reused commercially? | Not permitted |
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OpenSMTPD Is The Mail Server For The Future Image credit: the OpenSMTPD project © 2026 Peter N. M. Hansteen The SMTP mail server for the 21st century and onwards is OpenSMTPD, which is developed as an integral part of OpenBSD, but available in a portable variety too. It was one of those things that I had fully intended to do years ago, but I only got around to actually doing once there was a definite deadline to get it done. The time has come, as OpenBSD 7.9 will leave the exim package behind, and exim users will need to find a replacement before upgrading. This article describes my transition to OpenBSD's own OpenSMTPD mail server. OpenBSD 7.9 will leave the exim package behind, and exim users will need to find a replacement. OpenSMTPD (smtpd) is in the base system.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Nxdomain.
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