Skip to content

Issues and Pull Requests

This project is Open Source. That means that you can contribute on enhancements, bug fixing or improving the documentation.

Opening an Issue


Before opening an issue, read the README carefully, study the docs for your version (maybe latest), the Postfix/Dovecot documentation and your search engine you trust. The issue tracker is not meant to be used for unrelated questions!

When opening an issue, please provide details use case to let the community reproduce your problem. Please start DMS with the environment variable LOG_LEVEL set to debug or trace and paste the output into the issue.


Use the issue templates to provide the necessary information. Issues which do not use these templates are not worked on and closed.

By raising issues, I agree to these terms and I understand, that the rules set for the issue tracker will help both maintainers as well as everyone to find a solution.

Maintainers take the time to improve on this project and help by solving issues together. It is therefore expected from others to make an effort and comply with the rules.

Filing a Bug Report

Thank you for participating in this project and reporting a bug. Docker Mail Server (DMS) is a community-driven project, and each contribution counts!

Maintainers and moderators are volunteers. We greatly appreciate reports that take the time to provide detailed information via the template, enabling us to help you in the best and quickest way. Ignoring the template provided may seem easier, but discourages receiving any support (via assignment of the label meta/no template - no support).

Markdown formatting can be used in almost all text fields (unless stated otherwise in the description).

Be as precise as possible, and if in doubt, it's best to add more information that too few.

When an option is marked with "not officially supported" / "unsupported", then support is dependent on availability from specific maintainers.

Pull Requests


You want to add a feature? Feel free to start creating an issue explaining what you want to do and how you're thinking doing it. Other users may have the same need and collaboration may lead to better results.

Submit a Pull-Request

The development workflow is the following:

  1. Fork the project and clone your fork with git clone --recurse-submodules ... or run git submodule update --init --recursive after you cloned your fork
  2. Write the code that is needed :D
  3. Add integration tests if necessary
  4. Prepare your environment and run linting and tests
  5. Document your improvements if necessary (e.g. if you introduced new environment variables, describe those in the ENV documentation) and add your changes the changelog under the "Unreleased" section
  6. Commit (and sign your commit), push and create a pull-request to merge into master. Please use the pull-request template to provide a minimum of contextual information and make sure to meet the requirements of the checklist.

Pull requests are automatically tested against the CI and will be reviewed when tests pass. When your changes are validated, your branch is merged. CI builds the new :edge image immediately and your changes will be includes in the next version release.