Systems Engineer. Builder. Maintainer. Automation Engineer. Developer. I spend my time in the infrastructure layer — email, DNS, and the open internet — writing tools that are reliable, well-tested, and built to last. I've operated continuously available DNS servers since 1995. My focus is on reliability, automation, and clean, maintainable code.
- 🔭 I’m currently working on NicTool 3.0
- Email infrastructure — SMTP servers, delivery pipelines, anti-spam, authentication (SPF, DKIM, DMARC)
- DNS
- Systems automation — provisioning, configuration management, FreeBSD
- Open source maintenance — long-term stewardship of projects with active communities
Haraka — Node.js Mail Server
A fast, highly extensible, event-driven SMTP server. Haraka handles thousands of concurrent connections with a modular plugin architecture that makes it straightforward to add filtering, routing, auth, DKIM signing, and more. Developer and active maintainer with 188+ contributors and 5.6k stars.
JavaScript · SMTP · MTA · Node.js · 5,600+ ⭐ · 694 forks
NicTool — DNS Management Platform
A modern DNS management platform, rebuilt for the current internet. Includes:
- @nictool/server - A web UI for managing DNS
- api — NicTool API v3, a REST interface for DNS management.
- dns-resource-record — DNS RR swiss army knife for Node.js and browsers and 39 record types.
- dns-zone - Representation of a RFC 1035 DNS zone. Convert DNS zones between every common DNS server.
- dns-nameserver - Config file parser and generator for nameservers
JavaScript · DNS · Node.js · ESM
Mail::DMARC — DMARC Implementation
A complete implementation of the DMARC email authentication standard in Perl. Covers policy parsing, reporting, and a web UI for viewing your reports. Mail::DMARC is bundled with with SpamAssassin.
Perl · Email Security · DMARC · SPF · DKIM
Mail Toaster 6 — Mail Server Provisioning
A full-featured mail server provisioning system built on FreeBSD jails. Automates the deployment of a complete, production-ready mail infrastructure for 5 users or 50,000 domains worth of users.
Shell · FreeBSD · Infrastructure · DevOps · 54 ⭐
- Languages: JavaScript (Node.js), SQL, Shell Scripting, Perl
- Databases: MongoDB, Elasticsearch, MySQL, SQLite, Redis
- CI/CD: GitHub Actions
- 🌐 matt.simerson.net
- 🦋 @matt.simerson.net on Bluesky
- 💰 Sponsor my work at GitHub Sponsors or Patreon
Based in Seattle, WA.