Mailpit

An email testing tool that catches outgoing messages over SMTP and shows them in a web interface.

FreeOpen sourceWebSelf-hostedCommand line
Official websitemailpit.axllent.org

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1 more ways to get Mailpit

Package managers

About Mailpit

Mailpit acts as a local SMTP server for development. Instead of sending mail to real recipients, your application delivers messages to Mailpit, where you can read them in a web interface that updates live. It ships as a single static binary or a multi-arch Docker image with no dependencies.

Beyond viewing messages it checks HTML and CSS compatibility with common email clients, tests links, scores spam with SpamAssassin, generates screenshots and offers a REST API for automated tests. A POP3 server, tagging and relaying via an external SMTP server are also included.

Strengths

  • Single binary or Docker image with no dependencies
  • HTML compatibility, link and spam checks built in
  • REST API for integration testing
  • Live web UI with browser notifications

Limitations

  • For testing only, not a real mail client
  • Spam scoring relies on a SpamAssassin setup

Details

Pricing
FreeFree to download and run.
License
Open source, license not stated
Developer
axllent
Platforms
Web, Self-hosted, Command line
How it runs
Downloadable app, Self-hosted
Account
Not required
Works offline
Yes
Best suited for
Developers testing the email their applications send
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

Alternatives to Mailpit

Compare all

Software that can replace Mailpit for an important use case, and what changes if you switch.

  • Mailinator

    A disposable email service with public inboxes and paid private domains for email and SMS testing.

    FreemiumProprietaryWeb

    Mailinator is a hosted service with public inboxes and paid private domains for email and SMS testing, instead of a self-hosted SMTP catcher you run locally.

Mailpit as an alternative

Listings that name Mailpit as an alternative.

  • Postmark Spam Check

    A free web tool and JSON API that returns the SpamAssassin score of an email message.

    FreeProprietaryWeb

    Mailpit is open source and self-hosted, catching outgoing mail with built-in spam checks, though scoring relies on a SpamAssassin setup.

Similar software

Related functionality, not necessarily a direct replacement.

Report a wrong fact or a dead link on this listing