mlandauer/cuttlefish
Transactional email server with a lovely web interface observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases 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: n/a
- age_days: 4904
- days_rel: n/a
- days_push: 797
- n_releases_24m: 0
Adoption not part of the score
1623 stars · 181 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Cuttlefish is a self-hosted transactional email server built on Postfix with a Ruby on Rails web interface. It lets applications send email via SMTP while providing delivery monitoring, bounce handling, open/click tracking, and a GraphQL API.
Use cases
- send transactional emails from my app without vendor lock-in
- self-hosted alternative to sendgrid or mailgun
- monitor which emails bounce in real time
- track email opens and link clicks
- automatically stop sending to hard-bounced addresses
- manage smtp credentials for multiple apps
- check my email sending ip reputation
When to choose
- you want an open-source, self-hosted replacement for commercial transactional email services
- you need bounce handling, open/click tracking, and delivery webhooks with a friendly web UI
- you're comfortable running your own mail infrastructure with Postfix, PostgreSQL, and Redis
When to avoid
- you need incoming email handling, spam-complaint detection, or built-in email templates
- you prefer a managed service and don't want to operate an MTA
- you need a fully mature product - it's still labeled beta
Facets
service · maturity active
email webhook analytics api-framework email self-hosted backend developer-tools self-hosted transactional-email mta postfix dkim email-tracking smtp graphql-api open-source-alternative linux web-server docker
2 sources
- readme: https://github.com/mlandauer/cuttlefish · fetched 2026-08-28 · 40a0e85b4d92
- homepage: http://cuttlefish.io · fetched 2026-08-29 · b6cc40a8448f
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| mlandauer/cuttlefish | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="mlandauer/cuttlefish")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem