MailCue
Run as a fully hardened production email server.
MailCue provides a complete email testing environment packaged in a single Docker container. It runs a full mail stack—including SMTP, IMAP, POP3, DKIM signing, DMARC verification, and SpamAssassin filtering—so developers can observe how messages behave in a realistic production setting without external dependencies. The system also offers a REST API for programmatic sending, receiving, and searching of emails, and a React‑based web UI for interactive mailbox navigation and message inspection.
The server is designed for automation and CI/CD pipelines, exposing real‑time events via Server‑Sent Events and supporting GPG/PGP‑MIME operations such as key management, signing, and encryption. All data is stored in SQLite with optional AES‑256 encryption, eliminating the need for separate databases or message queues. Authentication relies on JWT tokens and Argon2id‑hashed passwords.
MailCue targets developers and QA teams that need a hardened, reproducible email infrastructure for testing delivery, authentication, spam handling, and encryption workflows. Its all‑in‑one container approach simplifies setup and teardown, allowing testing to start within seconds.
Reviews
Loading reviews…
Similar apps
Email Infrastructure
Mailu
Simple yet full-featured mail server as a set of Docker images.
Network & Connectivity
Poste.io
Full-featured solution for your Email server. Native implementation of last anti-SPAM methods, webmail and easy administration included…
Email Infrastructure
docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only…
API & Network Testing
MailTest
Debug email deliverability with 12 checks
Email Infrastructure
Mailcow
Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration.
Email Infrastructure
Mail-in-a-Box
Turns any Ubuntu server into a fully functional mail server with one command.