Description

Add a reusable email server stack/template based on Docker Mailserver for managing client email domains, as requested in issue #8266.

Changes

• Added templates/compose/docker-mailserver.yaml template
• Supports SMTP (25, 587), IMAP (143, 993)
• Includes persistent volumes for mail, state, and logs
• Compatible with Coolify’s proxy and certificate management

Related Issue

Closes #8266

/claim #8266