Proxmox Mail Gateway is an open-source email security solution designed to protect mail servers against all email threats from the moment they emerge. The flexible architecture combined with the user-friendly, web-based management interface, allows to control all incoming and outgoing emails and to protect their users from spam, viruses, phishing and trojans. The HostBill integration enables to provision and bill your clients for Proxmox Mail Gateway Security services. Service automation that HostBill provides ensures that the Mail Server Domain is created, removed, suspended or terminated automatically, based on the automation settings. The same concerns the upgrades and downgrades of the package limits. On the client side, the automation allows to view service configuration: Mail Server Domain, MX Usage Status and transport host, protocol and port. All can be easily managed from the admin panel.