# postalserver/postal

📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

Repository: https://github.com/postalserver/postal
Canonical: https://ross.abutalabs.com/products/postal
Homepage: https://postalserver.io
Language: Ruby
License: MIT
License Family: permissive
Topics: ruby, mail, smtp, postal, mail-server
Last push: 2026-08-18T02:35:19+00:00

## Health v2 (maintenance only)
Score: 90/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 98, release rhythm 75, longevity 100
- inputs: {"age_days": 3423, "days_push": 16, "days_rel": 91, "gap_med": 60.5, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 16769, forks 1281 (observed 2026-08-28T04:11:17.184824+00:00)

## What it is
Postal is a fully featured open-source mail delivery platform for sending and receiving email, a self-hosted alternative to Sendgrid/Mailgun. Written in Ruby, it provides SMTP and HTTP APIs for transactional email.

## Use cases
- send transactional email from my own servers
- self-hosted alternative to sendgrid
- receive inbound email via smtp
- track email deliveries and bounces
- run a mail server for my web apps

## When to choose
- you want full control over email delivery infrastructure
- you need to avoid per-email costs of ESPs
- you can operate your own servers and IP reputation

## When to avoid
- you prefer a managed email service
- you cannot maintain mail server deliverability

## Facets
- artifact type: application
- maturity: active
- function: email, http-server, api-framework
- domain: -
- platform: self-hosted
- tags: smtp, mail-server, transactional-email, mta, linux, docker

## Member repositories
- postalserver/postal (main) score 90

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:17.184824+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:04:16.295326+00:00, confidence not recorded.
  - readme: https://github.com/postalserver/postal (fetched 2026-08-28T04:11:17.184824+00:00, sha cd12bd3c9dae)
- Data as of 2026-08-30T08:39:29.467469+00:00.