MailCue

Run as a fully hardened production email server.

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MailCue is a comprehensive, all-in-one email testing server, conveniently packaged within a single Docker container for easy deployment. Moving beyond basic catch-all SMTP solutions, MailCue delivers a fully-featured mail stack, incorporating powerful components such as Postfix, Dovecot, SpamAssassin, and robust DKIM/DMARC verification, all managed through a modern React user interface. It allows you to meticulously test your email workflows to ensure they behave precisely as they would in a production environment, offering IMAP/POP3 access, API injection, real-time event monitoring, and GPG encryption support. MailCue is an indispensable tool for local development, streamlining CI/CD pipelines, and guaranteeing the reliable delivery of your critical transactional emails.