{"data":{"slug":"postal","name":"Postal","tagline":"MIT self-hosted mail delivery: SMTP + HTTP API","category":"notifications","categoryName":"Notifications","url":"https://github.com/postalserver/postal","github":"https://github.com/postalserver/postal","pricing":"open-source","hook":"Postal is the self-hosted mail server when Resend is hosted API and Listmonk is newsletters.","whatsGood":"MIT. SMTP + HTTP API mail delivery you run. Full control of queues, IPs, and logs. Docs live via GitHub (postalserver.io 301s — use the repo). No per-seat tax on the core.","theCatch":"Self-hosted mail delivery SMTP+HTTP API — not Resend hosted tx email, not Plunk Node email, not Listmonk newsletter app. You own deliverability and IP reputation. Distinct from Resend, Plunk, and Listmonk.","verdict":"MIT self-host mail. Free to run; deliverability is your ops.","addedAt":"2026-09-04","featured":false,"domain":"Comms","subSpecialty":"Email","capabilities":["email","smtp","self-host"],"surfaces":["API","Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"OSS/MIT","githubStars":16783},"related":[{"slug":"ntfy","name":"ntfy","tagline":"HTTP pub-sub notifications you can curl from cron"},{"slug":"novu","name":"Novu","tagline":"MIT notification workflows with a real 0 USD Cloud"},{"slug":"listmonk","name":"Listmonk","tagline":"AGPL-3.0 self-hosted newsletters and transactional mail"},{"slug":"apprise","name":"Apprise","tagline":"BSD-2-Clause CLI that talks to a hundred notifiers"},{"slug":"gotify","name":"Gotify","tagline":"MIT self-host push server; Android-first, no ntfy.sh twin"}],"links":{"self":"/api/gems/postal","html":"/gems/postal","markdown":"/gems/postal.md","category":"/api/gems?category=notifications","categoryPage":"/stacks/notifications"}}