postalsys/emailengine
Headless email client observed · 2026-08-28
Health v2 · maintenance only
95/100
- Activity 99
- Release rhythm 87
- Longevity 100
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 5.0
- age_days: 2378
- days_rel: 7
- days_push: 7
- n_releases_24m: 115
Adoption not part of the score
2217 stars · 226 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
EmailEngine is a self-hosted, source-available (not open-source) headless email client that exposes IMAP, SMTP, Gmail API, and Microsoft Graph through a unified REST API with real-time webhooks. It handles account onboarding via hosted OAuth2 forms, queued sending with tracking and bounce handling, and includes an admin dashboard, requiring a paid subscription beyond a 14-day trial.
Use cases
- sync users' emails with my app without IMAP/MIME code
- send emails on behalf of users via one REST API
- get webhooks when new mail arrives in a mailbox
- connect Gmail and Outlook accounts with OAuth2 without building the flows
- monitor where test emails land (inbox placement)
- build a lightweight webmail or mobile email client
- integrate a support email account into my service
- let legacy SMTP/IMAP clients reach OAuth2-only mailboxes
When to choose
- you need a unified email API across IMAP, Gmail, and Microsoft 365 providers
- you want real-time push notifications instead of IMAP polling
- you must keep email data on your own infrastructure (self-hosted)
- you want hosted OAuth2 onboarding so users never hand you passwords
- you're willing to pay a subscription for a production-grade email gateway
When to avoid
- you need truly open-source software with a free license for commercial use
- you only need to send transactional email from your own address (a plain SMTP library like Nodemailer suffices)
- you want a fully managed hosted email API service
- you cannot run Redis or self-manage a server instance
Facets
service · maturity active
email api-framework http-server webhook auth search-engine email apis self-hosted backend windows self-hosted email-api imap smtp gmail-api microsoft-graph source-available webhooks oauth2 email-sync nodemailer automation nodejs docker linux macos web-server
10 sources
- readme: https://github.com/postalsys/emailengine · fetched 2026-08-28 · ace58dcd7b35
- homepage: https://emailengine.app/ · fetched 2026-08-29 · f198bcb5504e
- site_page: https://learn.emailengine.app/docs/api/emailengine-api · fetched 2026-08-29 · 999f090fa775
- site_page: https://learn.emailengine.app/docs/support · fetched 2026-08-29 · cd2745f117db
- site_page: https://learn.emailengine.app/docs/installation · fetched 2026-08-29 · fddeab512cb5
- site_page: https://learn.emailengine.app/docs/api/post-v-1-authentication-form · fetched 2026-08-29 · b56cb46e5b60
- site_page: https://learn.emailengine.app/docs/installation/docker · fetched 2026-08-29 · 9ba5e3beecac
- site_page: https://learn.emailengine.app/docs/accounts/hosted-authentication · fetched 2026-08-29 · 7000e1a75c9d
- site_page: https://learn.emailengine.app/docs/webhooks/overview · fetched 2026-08-29 · 536c65ed828c
- site_page: https://learn.emailengine.app/ · fetched 2026-08-29 · 9826420e6f28
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| postalsys/emailengine | main | 95 |
For agents
markdown · JSON · MCP: product_card(name="postalsys/emailengine")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem