Migrating Google Workspace to Synology NAS

Concept: Migrating a 40-user organization from managed Google Workspace to a self-hosted environment without dropping business-critical mail.

Execution & Architecture:

• Routing: Deploy a split architecture via How Our New Email Routing Works for local storage combined with reliable sending.
• Authentication: Implement strict DNS policies detailed in Stopping Our Emails from Going to Spam to bypass external spam filters.
• Pre-provisioning: Create all 40 user accounts in the NAS before flipping DNS records. If the Postfix engine doesn’t recognize an incoming address, it triggers a “User unknown” hard bounce.
• Cutover: Flip MX records and execute the AWS Sandbox bypass via live chat to guarantee immediate sending capabilities.
• Troubleshooting: Reference the QnA Log Email Migration for specific edge cases encountered during the cutover.