Proxmox Mail Gateway

Proxmox Mail Gateway is an open-source email security solution designed to sit in front of mail servers and filter spam, malware, and phishing attempts before they reach users. It operates as a secure mail relay, analyzing inbound and outbound messages using reputation checks, advanced filtering rules, DNS-based blacklists (DNSBL), and virus scanning. The platform’s web-based management interface makes it straightforward for IT teams to configure scanning policies, quarantine handling, and domain-wide security controls without significant overhead or licensing restrictions.

Proxmox Mail Gateway is commonly used in organizations that maintain their own on-premise or cloud-hosted mail servers, including Microsoft Exchange, Postfix, and Zimbra. Its layered approach to filtering helps reduce risks from phishing attacks, spoofing attempts, and email-borne malware campaigns. For organizations aiming to improve email security posture, Proxmox Mail Gateway supports DKIM, SPF, and DMARC validation, helping enforce sender authenticity and reduce impersonation risks.