OpenSMTPD Is The Mail Server For The Future
OpenSMTPD is being positioned as the future mail server for users transitioning from exim. OpenBSD 7.9 will no longer support the exim package, prompting users to seek alternatives. The author shares their experience of moving to OpenSMTPD after years of maintaining a complex mail setup with exim.
- ▪OpenSMTPD is developed as part of OpenBSD and is available in a portable version.
- ▪OpenBSD 7.9 will not include the exim package, requiring users to find replacements.
- ▪The author had been using exim for years but decided to transition to OpenSMTPD due to its improvements.
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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 Blogspot.
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