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MailCatcher project preview
Developer ToolsAlternative to MailosaurAlternative to MailtrapAlternative to Papercut

MailCatcher

Catches mail and serves it through a dream: super simple SMTP server and web interface.

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LicenseMIT
GitHub stars5.5k
Last commit1 weeks ago
Tags5 topics
Ruby Mail CatcherEmail Inspection UiMailcatcher AppDeveloper ToolsSmtp Development Server
Overview

Why consider MailCatcher?

MailCatcher is an open-source development SMTP server written in Ruby by Samuel Cochran (sj26). MailCatcher accepts outgoing mail from any application on port 1025, displaying HTML, plain text, and multipart MIME attachments in an instant web browser UI.

Guided learning

Learn MailCatcher by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of MailCatcher

MailCatcher catches outgoing transactional test emails and displays them in a web interface.

Quickstart

bash
1gem install mailcatcher
2mailcatcher --ip=0.0.0.0

MailCatcher is licensed under the permissive MIT License.

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MailCatcher FAQs

MailCatcher is listed as a Developer Tools tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

MailCatcher is listed under the MIT license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

MailCatcher is listed as an alternative to Mailosaur. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.