Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

OpenSMTPD: History, Overview & Goals

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.

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

OpenSMTPD topic overview

The analysis highlights History, Overview and Goals as prominent areas in the source structure around OpenSMTPD.

Related topics
21
Source areas
3
Connected nodes
24
Extracted relationships
27
Concept neighborhoods
17
Bridge connections
24

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 17 topics
Goals · 3 topics
History · 1 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

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)

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History

Goals

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How OpenSMTPD connects Entity context

The extracted context around OpenSMTPD shows recurring relationship patterns in the source. For example, OpenSMTPD → After, As, October, On, OpenBSD, SMTP, The, Version Another extracted example is OpenSMTPD → As, Code, CPU, In, OpenBSD, Security, SMTP. Use these groups to spot repeated connection types before inspecting the individual relationships.

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

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

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

OpenSMTPD relationships Subject–Predicate–Object triples

TTTA extracted 27 structured relationships around OpenSMTPD. Examples in this analysis include OpenSMTPD → As of → August 2025 and OpenSMTPD → Developer → The OpenBSD Project. The table shows each extracted connection, where it came from and its confidence.

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

Related concept clusters Concept neighborhoods

The concept neighborhoods around OpenSMTPD bring nearby vocabulary together. In this analysis, examples include Smtp, Daemon and Mail. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • OpenSMTPD
    • Smtp
    • Daemon
    • Mail
    • Use
    • Security
    • Deliver
    • Server
    • Simple
    • Transfer
    • Audit
    • Development
    • Goals
  • opensmtpd
    • Smtp
    • Daemon
    • Mail
    • Use
    • Security
    • Deliver
    • Server
    • Simple
    • Transfer
    • Audit
    • Development
    • Goals
  • openbsd
    • Project
    • Opensmtpd
    • Smtp
    • Deliver
    • Developed
    • Release
    • Server
    • Simple
    • System
    • Transfer
    • Website
    • Daemon
  • simple mail transfer protocol
    • Deliver
    • Server
    • Transfer
    • Unix
    • Smtp
    • Freebsd
    • Isc
    • License
    • Linux
    • Netbsd
    • Operating
    • Release
  • freebsd
    • Linux
    • Netbsd
    • Operating
    • Isc
    • License
    • Longeau
    • Portable
    • Release
    • Server
    • Support
    • System
    • Systems
  • goals
    • Ease
    • Use
    • Security
    • Freebsd
    • Isc
    • License
    • Linux
    • Netbsd
    • Operating
    • Release
    • Server
    • Support
  • linux
    • Netbsd
    • Operating
    • License
    • Longeau
    • Portable
    • Release
    • Server
    • Support
    • System
    • Systems
    • Transfer
    • Website
  • netbsd
    • Freebsd
    • Linux
    • Operating
    • License
    • Portable
    • Release
    • Server
    • Support
    • System
    • Systems
    • Transfer
    • Website

Connections between topic areas Semantic bridges

For OpenSMTPD, one of the stronger structural bridges in this analysis connects OpenSMTPD with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
OpenSMTPDOverview · splits 7 ⟂ 18
OpenSMTPDGoals · splits 21 ⟂ 4

Map overview Semantic statistics

OpenSMTPD

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

Source & methodology

TTTA analyzes the structure around OpenSMTPD to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Overview & Goals, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — OpenSMTPD · EN edition · Analysis: TopicsToTalkAbout

For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.