mailhog/MailHog
Web and API based SMTP testing observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
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: 4522
- days_rel: n/a
- days_push: 932
- n_releases_24m: 0
Adoption not part of the score
16138 stars · 1180 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
MailHog is an email testing tool that runs a fake SMTP server and exposes a web UI and JSON API for inspecting outgoing messages. It can optionally release captured messages to real SMTP servers and supports in-memory, MongoDB, or file-based storage.
Use cases
- test email sending in local development
- capture emails from my app without a real SMTP server
- inspect outgoing emails in a web UI
- retrieve test emails via a JSON API
- test SMTP failure scenarios with chaos monkey
- release captured test emails to a real mail server
When to choose
- you need a lightweight, install-free fake SMTP server for development or CI
- you want a web UI plus API to inspect and manage test emails
- you need to simulate SMTP failures or auth during testing
When to avoid
- you need a production mail transfer agent or actual email delivery
- you require actively developed features or frequent updates
- you need a hosted email testing service with team sharing
Facets
application · maturity maintenance
email http-server web-framework testing developer-tools email testing self-hosted windows go cross-platform smtp-testing fake-smtp email-catcher web-ui -api sendmail linux macos docker
1 source
- readme: https://github.com/mailhog/MailHog · fetched 2026-08-28 · 35c7bc323773
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| mailhog/MailHog | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem