trumail/trumail
:email: :white_check_mark: A Fast and Free Email Verification API written in Go observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases archived
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: n/a
- age_days: 3246
- days_rel: n/a
- days_push: 3002
- n_releases_24m: 0
Adoption not part of the score
1052 stars · 229 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Trumail is a free, open-source email verification system written in Go that checks address deliverability via SMTP handshakes with mail servers on port 25. It is available as a Go client library, a self-hostable Dockerized HTTP API, and a public API endpoint.
Use cases
- verify if an email address is deliverable before sending
- self-host an email validation API
- check for disposable email addresses at signup
- validate email syntax and MX records
- reduce email bounces by filtering invalid addresses
- integrate email verification into a Go application
When to choose
- you want a free, self-hosted alternative to paid email verification services
- you need a simple Go library or Docker image for SMTP-based email checks
- your server can make outbound port 25 connections (e.g., AWS, DigitalOcean)
When to avoid
- your hosting provider blocks outbound port 25 traffic, such as most residential ISPs
- you need bulk list verification, scoring, or rich metadata like catch-all and greylisting detection
- you want a maintained SaaS with SLAs and support rather than a project with no releases since 2018
Facets
service · maturity maintenance
email http-server api-framework cli email apis self-hosted developer-tools go self-hosted cli email-verification smtp-verification email-validation mx-lookup disposable-email-detection json-api automation docker linux
9 sources
- readme: https://github.com/trumail/trumail · fetched 2026-08-28 · 16b83cdbb5be
- homepage: https://trumail.io · fetched 2026-08-29 · 0ba8450117c9
- site_page: https://emailable.com/docs · fetched 2026-08-29 · 581e52f2838a
- site_page: https://emailable.com/docs/api · fetched 2026-08-29 · cdd1269b3065
- site_page: https://emailable.com/about-us · fetched 2026-08-29 · e2e1f84b764f
- site_page: https://emailable.com/ · fetched 2026-08-29 · 7359604b1c28
- site_page: https://emailable.com/pricing · fetched 2026-08-29 · 8776a21940b1
- site_page: https://emailable.com/integrations · fetched 2026-08-29 · 870431e0bf8d
- site_page: https://emailable.com/faq · fetched 2026-08-29 · f8c3e95843af
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| trumail/trumail | main | 10 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem