Open Source Alternatives to Mailinator

An email testing and management service that provides disposable email addresses for software testing and spam prevention. The platform allows developers and QA engineers to verify email workflows, capture registration emails, and test notification systems without creating permanent accounts. It provides a public inbox for general use and private domains for corporate environments to ensure data isolation. The service is used to automate the verification of email delivery and content during the development lifecycle. It is deployed as a cloud based tool accessible via a web interface or API, enabling teams to integrate email testing directly into their continuous integration pipelines. The platform supports both manual inspection of messages and programmatic retrieval of data for automated test suites.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Mailinator give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 1 open source alternative to Mailinator. The most popular is Open Trashmail. It uses the Apache-2.0 license and ships an official Docker image.