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Inbucket

Email testing server that accepts mail for any address over SMTP and shows it in a web interface, with REST and POP3 access.

Inbucket is an email testing server. It accepts mail for any address over SMTP, stores each message as a file on disk, and shows the messages in a web interface with REST and POP3 access. Applications send their mail to its built-in SMTP server, and developers read the result in the browser. It is written in Go, and the project’s pages describe running it as a daemon, from a compiled binary or from a Docker image.

Worth knowing

The project calls itself an email testing application, written for web developers who want to see the emailed output of their applications.

Identity

Status
Active
Maintainer
James Hillyerd3
Maintained by
Individual3
First release
20144

Rendering and deploy

Runs as
Always on5
Install with
docker15

Releases

Current major version
36
Last release
2026-10-106

Adoption

GitHub stars
2,3112
Contributors
292

Why these figures do not compare

Sources

  1. 2026-11-03: links, Install with, Categories, License
    inbucket.org
  2. 2026-11-03: links, Written in, License, GitHub stars, Contributors
    github.com/inbucket/inbucket
  3. 2026-11-03: Maintainer, Maintained by
    github.com/inbucket/inbucket/blob/main/LICENSE
  4. 2026-11-03: First release
    inbucket.org/news/2014/04/one-point-oh.html
  5. 2026-11-03: Runtime, Runs as, Install with, Content API
    github.com/inbucket/inbucket/blob/main/README.md
  6. 2026-11-03: Current major version, Last release
    github.com/inbucket/inbucket/releases/tag/v3.2.0

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