Brand Proxmox Mail Gateway Spam Reports & Quarantine Emails

Published 04/08/2026

Description

Make your Proxmox Mail Gateway (PMG) emails look like they come from your company—not from a generic mail-security appliance. Contents: 0:00 - Introduction 0:17 - Description 0:52 - Daily Spam Mail 5:53 - Quarantine Link 9:57 - Status Report 11:27 - Extra Branding 14:11 - Conclusion In this video, I show how to customize and brand the customer-facing emails sent by Proxmox Mail Gateway. This includes the daily or weekly spam quarantine report, the on-demand quarantine-link email, and the PMG administrator status report. A branded spam report helps users recognize legitimate messages, understand why an email was quarantined, and safely use the available actions: deliver, whitelist, blacklist, or delete. This tutorial is useful if you are using: Switching PMG spam reports to the Custom report style Creating a custom spamreport-custom.tt template Adding company headers, footers, colors, and HTML styling Improving Outlook compatibility with Microsoft Office-specific HTML Embedding a company logo as a Base64 image Testing custom spam reports without waiting for the daily schedule Customizing quarantine-link emails Enabling user quarantine-link authentication Customizing the PMG status report email Setting a common sender address for PMG-generated emails Considerations for multiple PMG servers and PMG clusters Why some template changes can be overwritten during upgrades Using a shared hostname, DNS, TLS certificates, and HTTPS port mapping for quarantine links Proxmox Mail Gateway supports a custom spam-report template, while other mail templates may require extra maintenance after PMG updates. If you run more than one PMG server, deploy the relevant templates consistently to every node that can generate reports. This tutorial is useful for IT administrators, MSPs, homelab users, and companies using Proxmox Mail Gateway as an email-security layer in front of Microsoft 365, Exchange, or another mail platform. #