Postalserver by postalserver
A fully featured open source mail delivery platform for incoming & outgoing e-mail
About Postalserver
From the project's README at github.com/postalserver/postal. Lightly cleaned for readability; for the full source see the upstream repo.
Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.
Documentation Installation Instructions FAQs & Features Discussions - ask for help or request a feature Join us on Discord
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 16k | github.com/postalserver/postal |
| GitHub forks | 1.2k | github.com/postalserver/postal |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 9.1 years | since Apr 2017 |
| Last commit | 2 days ago | May 5, 2026 |
| Releases shipped | 29 | last: 9 days ago |
| Security policy | SECURITY.md | declared by maintainers |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
Security advisories
CVE-2026-25529. What people say on Hacker News
- Denmark's state-run postal service will no longer deliver letters (2025)
- PortalVR Motion – use any VR content in 2D with 3D tracked Joy-Cons
- Show HN: Mach Triage – A local-first desktop client for your ticket queue
- The Longest Softlock in Portal [video]
- Show HN: Threej games – open-source gaming portal
Replaces these paid SaaS
Postalserver is one of the open-source alternatives to:
Ready to self-host Postalserver?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
Similar open-source projects
Projects in our directory that replace the same SaaS or share topics with Postalserver.