Changes

• Added a new one-click service template for Docker Mailserver.
• Created templates/compose/docker-mailserver.yaml with:
  • Exposed ports: 25 (SMTP), 465 (SMTPS), 587 (Submission), 993 (IMAPS)
  • 4 persistent volumes for mail data, state, logs, and configuration
  • DKIM, SPF, and DMARC support
  • Optional ClamAV and SpamAssassin
  • Fail2Ban enabled
  • Healthcheck, restart policy, entrypoint, and required Linux capabilities
  • 26 configurable environment variables
  • Auto-generated postmaster account
• Added service icon at svgs/docker-mailserver.svg.
• Verified valid YAML structure including all 6 required Coolify metadata fields.

This adds a reusable, production-ready email server stack suitable for managing multiple domains within Coolify.

Issues

• fixes: #8266
• /claim #8266

Category

• Adding new one click service

Screenshots or Video (if applicable)

AI Usage

• AI is NOT used in the process of creating this PR

Steps to Test

• Step 1 – Pull this branch and enter the Coolify container.
• Step 2 – Run php artisan generate:services to regenerate service-templates.json.
• Step 3 – Open the Coolify dashboard and navigate to Create → One-Click Services.
• Step 4 – Verify that Docker Mailserver appears in the service list with the envelope icon.
• Step 5 – Create a new instance and confirm that:
  • All 4 ports (25, 465, 587, 993) are exposed.
  • 4 persistent volumes are created.
  • Environment variables are configurable.
  • The container starts successfully and passes the healthcheck.

Contributor Agreement

[!IMPORTANT]

• I have read and understood the contributor guidelines. If I have failed to follow any guideline, I understand that this PR may be closed without review.
• I have tested the changes thoroughly and am confident that they will work as expected without issues when the maintainer tests them.