mailpit-fips

Chainguard Container for mailpit-fips

Mailpit is an email and SMTP testing tool with API for developers.

Chainguard Containers are regularly-updated, secure-by-default container images.

Download this Container Image

For those with access, this container image is available on cgr.dev:

docker pull cgr.dev/ORGANIZATION/mailpit-fips:latest

Be sure to replace the ORGANIZATION placeholder with the name used for your organization's private repository within the Chainguard Registry.

Compatibility Notes

The mailpit-fips Chainguard Container is a drop-in replacement for the upstream Mailpit image. It provides the same functionality with the following differences:

• Runs as a non-root user by default
• FIPS-validated cryptographic modules for regulated environments

FIPS Compliance

This image is built with FIPS-validated cryptographic modules to enforce FIPS mode. The image will panic if FIPS mode cannot be initialized, ensuring compliance in regulated environments.

Getting Started

You can run Mailpit directly with Docker:

docker run -d \
  -p 8025:8025 \
  -p 1025:1025 \
  cgr.dev/ORGANIZATION/mailpit-fips:latest

This starts Mailpit with the web UI accessible at http://localhost:8025 and the SMTP server listening on port 1025.

Deploying with Helm

You can deploy Mailpit to Kubernetes using the jouve Helm Chart.

First, create a values.yaml file to configure the Chainguard Container:

image:
  registry: cgr.dev
  repository: ORGANIZATION/mailpit-fips
  tag: latest

Then deploy the Helm chart:

helm repo add jouve https://jouve.github.io/charts/
helm install mailpit jouve/mailpit -f values.yaml

Sending a Test Email

Once Mailpit is running, you can send a test email. These instructions are based on the upstream documentation.

Create a file called email.txt with the following contents:

cat > email.txt <<EOF
From: sender@example.com
To: recipient@example.com
Subject: Email Subject

This is the body of the email.
It can contain multiple lines of text.
EOF

If using Kubernetes, port forward the services:

kubectl port-forward svc/mailpit-http 8025:80 &
kubectl port-forward svc/mailpit-smtp 1025:25 &

Send the email using the Mailpit sendmail command:

mailpit sendmail < email.txt

Navigate to http://localhost:8025 to view the email in the Mailpit web interface.

Documentation and Resources

• Mailpit Official Documentation
• Mailpit GitHub Repository
• Chainguard Academy

What are Chainguard Containers?

Chainguard's free tier of Starter container images are built with Wolfi, our minimal Linux undistro.

All other Chainguard Containers are built with Chainguard OS, Chainguard's minimal Linux operating system designed to produce container images that meet the requirements of a more secure software supply chain.

The main features of Chainguard Containers include:

• Minimal design, without unnecessary software bloat
• Daily builds to ensure container images are up-to-date with available security patches
• High quality build-time SBOMs attesting to the provenance of all artifacts within the image
• Verifiable signatures provided by Sigstore
• Reproducible builds with Cosign and apko (read more about reproducibility)

For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a development, or -dev, variant.

In all other cases, including Chainguard Containers tagged as :latest or with a specific version number, the container images include only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager.

Although the -dev container image variants have similar security features as their more minimal versions, they include additional software that is typically not necessary in production environments. We recommend using multi-stage builds to copy artifacts from the -dev variant into a more minimal production image.

Need additional packages?

To improve security, Chainguard Containers include only essential dependencies. Need more packages? Chainguard customers can use Custom Assembly to add packages, either through the Console, chainctl, or API.

To use Custom Assembly in the Chainguard Console: navigate to the image you'd like to customize in your Organization's list of images, and click on the Customize image button at the top of the page.

Learn More

Refer to our Chainguard Containers documentation on Chainguard Academy. Chainguard also offers VMs and Libraries — contact us for access.

Trademarks

This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.