Mailpit Self-Hosted

Explore this developer service’s free allowance, critical restrictions and official documentation before deploying.

INCLUDED FREE ALLOWANCE

Free MIT-licensed local/self-hosted SMTP capture and email-testing server with a web inbox, message search, REST API, HTML/link checks and Docker or single-binary deployment; no vendor software quota.

Plan details

Plan: Ongoing free allowance
Credit card: Not required
Commercial use: Allowed
Last checked: 2026-10-26

Important restrictions

For development and staging email testing, not a managed email delivery provider. Default automatic pruning retains the latest 500 messages; protect the SMTP and web UI with authentication/network controls, especially when using optional relay/forwarding. You operate any hosting infrastructure.

View official documentation

Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.