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OpenSMTPD

OpenSMTPD (also known as OpenBSD SMTP Server) is a Unix daemon implementing the Simple Mail Transfer Protocol to deliver messages on a local machine or to relay them to other SMTP servers. It was publicly released on 17 March 2013 with version number 5.3, after being in development since late 2008.

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As of
August 2025
Developer
The OpenBSD Project
License
ISC
Operating system
OpenBSD, FreeBSD, NetBSD, Linux, macOS
Platform
Cross-platform
Release
5.3 / 17 March 2013; 13 years ago (2013-03-17)

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Overview

History

Goals

Advanced semantic analysis

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Map overview Semantic statistics

OpenSMTPD

Nodes25
Edges24
Triples27
Avg. degree1.92
Density0.08
Components1

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OpenSMTPD

Top relations

related to history · 8
OpenSMTPD → After, As, October, On, OpenBSD, SMTP, The, Version
related to Goals · 7
OpenSMTPD → As, Code, CPU, In, OpenBSD, Security, SMTP
As of · 1
OpenSMTPD → August 2025
Developer · 1
OpenSMTPD → The OpenBSD Project
License · 1
OpenSMTPD → ISC
Operating system · 1
OpenSMTPD → OpenBSD, FreeBSD, NetBSD, Linux, macOS
Platform · 1
OpenSMTPD → Cross-platform
Release · 1
OpenSMTPD → 5.3 / 17 March 2013; 13 years ago (2013-03-17)
Repository · 1
OpenSMTPD → github.com/OpenSMTPD
Stable release · 1
OpenSMTPD → 7.7.0p0 / 15 May 2025; 15 months ago (2025-05-15)

Important terminology Word statistics

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Important terminology

openbsd version smtp security code mail project released use goals portable daemon netbsd freebsd linux development developed charles longeau support

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
OpenSMTPDAs ofAugust 20251.00infobox
OpenSMTPDDeveloperThe OpenBSD Project1.00infobox
OpenSMTPDLicenseISC1.00infobox
OpenSMTPDOperating systemOpenBSD, FreeBSD, NetBSD, Linux, macOS1.00infobox
OpenSMTPDPlatformCross-platform1.00infobox
OpenSMTPDRelease5.3 / 17 March 2013; 13 years ago (2013-03-17)1.00infobox
OpenSMTPDRepositorygithub.com/OpenSMTPD1.00infobox
OpenSMTPDStable release7.7.0p0 / 15 May 2025; 15 months ago (2025-05-15)1.00infobox
OpenSMTPDStandardRFC 53211.00infobox
OpenSMTPDTypeMail transfer agent1.00infobox
OpenSMTPDWebsitewww.opensmtpd.org1.00infobox
OpenSMTPDWritten inC1.00infobox

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