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An SMTP test server that catches outgoing mail from your apps and shows it in a web inbox. This page describes the Levelrail template for MailHog (Developer Tools). It deploys the services below as one Docker Compose app on your own server. Project site: https://github.com/mailhog/MailHog. Recommended memory: about 128 MiB.

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Services, ports and volumes

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Environment variables

This template sets no environment variables. Passwords and keys marked as generated are created for you when the app is deployed and stored as secrets. Values are not shown here.

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Deploy MailHog with Levelrail

In the dashboard, open Apps, choose New app, then Browse templates, and select MailHog. Review the Compose body and deploy. With the CLI:
See the service template catalog for how templates work, and Getting started if you have not installed Levelrail yet.

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More Developer Tools templates

All templates are listed in the self-host gallery.
Last modified on October 19, 2026