MailCatcher
self-hosted, mail agents

MailCatcher is a Ruby gem that sets up a simple SMTP MTA gateway, which captures all incoming mail and presents it in a web interface. It is particularly useful for debugging and development purposes, allowing developers to inspect outgoing emails without sending them to actual recipients. By intercepting emails in a local environment, MailCatcher provides a convenient way to test email functionality and troubleshoot issues before deploying to production.

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