mailcue
mailcue is an MCP server, listed under cloud & infrastructure. It reaches mailcue. It needs MAILCUE_ADMIN_PASSWORD to authenticate. Its repository has 26 GitHub stars and is licensed under MIT; we last read it on 2026-10-22.
mailcue provides a realistic email testing environment in a Docker container, offering SMTP, IMAP, DKIM/DMARC, spam filtering, and a REST API with Node/Python SDKs.
Install
Read from mailcue’s own README, close to verbatim -- not written by us, and not guessed.
docker run -d --name mailcue -p 8088:80 -p 25:25 -p 587:587 -p 143:143 -p 993:993 -v mailcue-data:/var/mail/vhosts -v mailcue-db:/var/lib/mailcue -e MAILCUE_DOMAIN=mailcue.local -e MAILCUE_ADMIN_PASSWORD=mailcue ghcr.io/olib-ai/mailcue
What it reaches, and what it needs
Reaches
mailcue
Credential
MAILCUE_ADMIN_PASSWORD
Maintenance
Stars
26
State
listed
Licence
MIT
From the repository
Realistic email testing server in a single Docker container. SMTP, IMAP, DKIM/DMARC, spam filtering, REST API, Node/Python SDKs, and an MCP server.
mailcue compared with similar servers
| Server | Reaches | Needs | Stars | Last update | Licence |
|---|---|---|---|---|---|
| mailcue (this page) | mailcue | MAILCUE_ADMIN_PASSWORD | 26 | 2026-10-18 | MIT |
| memora | cloudflare, memora, openai | CLOUDFLARE_API_TOKEN, MEMORA_EMBEDDING_API_KEY, OPENAI_API_KEY | 744 | 2026-10-24 | MIT |
| mcp-for-argocd | argocd | ARGOCD_API_TOKEN, MCP_AUTH_TOKEN | 596 | 2026-10-16 | Apache-2.0 |
| prometheus-mcp-server | prometheus | PROMETHEUS_PASSWORD | 519 | 2026-10-19 | MIT |
| agenticmail | agenticmail, cloudflare, gmail, openai, relay | AGENTICMAIL_API_KEY, AGENTICMAIL_INBOUND_SECRET, AGENTICMAIL_MASTER_KEY, CLOUDFLARE_API_TOKEN, GMAIL_PASSWORD, GMAIL_RELAY_APP_PASSWORD, OPENAI_API_KEY, RELAY_PASSWORD | 239 | 2026-10-21 | MIT |
| opik-mcp | opik | OPIK_API_KEY | 225 | 2026-10-22 | Apache-2.0 |
Ranked by services in common with mailcue, then by stars. Figures are from each repository when we last read it.
Common questions about mailcue
- What does mailcue do?
- mailcue provides a realistic email testing environment in a Docker container, offering SMTP, IMAP, DKIM/DMARC, spam filtering, and a REST API with Node/Python SDKs.
- How do I install mailcue?
- Its own README gives this command: docker run -d --name mailcue -p 8088:80 -p 25:25 -p 587:587 -p 143:143 -p 993:993 -v mailcue-data:/var/mail/vhosts -v mailcue-db:/var/lib/mailcue -e MAILCUE_DOMAIN=mailcue.local -e MAILCUE_ADMIN_PASSWORD=mailcue ghcr.io/olib-ai/mailcue. Run it where your MCP client can launch the server, and check the README for any settings it asks for.
- What does mailcue connect to, and what does it need?
- It reaches mailcue. The credentials we found in its source are MAILCUE_ADMIN_PASSWORD.
- Is mailcue official and is it maintained?
- We found nothing naming it as a vendor’s official server. Its repository has 26 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-10-18.
- What licence does mailcue use?
- The repository declares the MIT licence.
More MCP servers for cloud & infrastructure
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- opik-mcp225 stars
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