Proxmox Server Solutions has announced the release of Proxmox Mail Gateway 8.2, the most recent iteration of Proxmox's open-source email security solution. The platform based on Debian GNU/Linux 12.9 "Bookworm" and is configured to utilize the latest Linux kernel 6.8 by default.
The package comprises ZFS 2.2.7 and SpamAssassin 4.0.1, featuring updated rulesets. The anti-spam and antivirus filtering solution operates as a comprehensive mail proxy, safeguarding organizations from threats such as spam, viruses, Trojans, and phishing emails. The version enhances access management by incorporating support for various authentication realms in the backend login, allowing administrators to access Proxmox Mail Gateway through single sign-on (SSO) authentication methods, with OpenID Connect being the initial supported authentication protocol.
The development team has enhanced the rule system, enabling more precise filtering of attachments and limiting header fields to the top header section. The Proxmox Mail Gateway now offers support for automated and unattended installation, greatly simplifying large deployments. The software can be accessed as an ISO download, as a container appliance within Proxmox VE, and is distributed under the GNU Affero GPL, v3.
Here the full press release:
Proxmox Mail Gateway 8.2 released
Enterprise software developer Proxmox Server Solutions GmbH ("Proxmox" or the "Company") today released Proxmox Mail Gateway 8.2, the latest version of its open-source email security solution. The Mail Gateway platform is a complete operating system based on Debian 12.9 “Bookworm”, but defaulting to the newer Linux kernel 6.8 and allowing for opt-in use of kernel 6.11. It includes ZFS 2.2.7 and SpamAssasin 4.0.1 with updated rulesets.
The anti-spam and antivirus filtering solution functions as a full-featured mail proxy, that is deployed between the firewall and the internal mail server. It protects organizations against threats, such as spam, viruses, Trojans, and phishing emails.
What’s new in Proxmox Mail Gateway 8.2
- Single sign-on: This version simplifies access management by integrating support for multiple authentication realms in the backend login. This eliminates the need to manage specific authentication details, enabling administrators to log into Proxmox Mail Gateway using single sign-on (SSO) authentication schemes with the new OpenID Connect as the first supported authentication protocol. This enables logging in through public as well as self-hosted services like Keycloak, Zitadel or LemonLDAP::NG.
- Enhanced rule system: The Proxmox development team adds further improvements to the configuration options of the comprehensive object-oriented rule system, by which the mail flow can be controlled and filtered. The filtering of the mail's content by Content-Type can now be configured to ignore information from the filename and the Content-Type header field, and to rely solely on file signature based detection, allowing for accurate filtering of attachments. Furthermore, the filtering of mail header fields can now be restricted to the top header section, thereby providing the option to exclude headers in attached emails from the filter.
- DKIM signature for emails generated by Proxmox Mail Gateway: Users can now set the From-header for emails generated by Proxmox Mail Gateway, like for example for notifications from the rule system, admin reports, or backup notifications. These emails are signed with DKIM if the installation uses the header information to obtain the domain for signing.
- Automated and unattended installation: Proxmox Mail Gateway now supports automated and unattended installation making large deployments significantly easier. Proxmox offers a ‘proxmox-auto-install-assistant’ tool that fully automates the setup process on bare-metal. Automated installation allows for the rapid deployment of Proxmox Mail Gateway hosts without the need for manual access to the systems, saving time and reducing the risk of errors. To use this method, an answer file must be prepared with the necessary configuration settings for the installation process. This file can be provided directly in the ISO, on an additional disk such as a USB flash drive, or over the network. Tailor-made configurations for customized deployments can be achieved by running a custom script on first boot after an automated installation.
Availability
Proxmox Mail Gateway is released under the GNU Affero GPL, v3 and is available as an ISO download, which can be installed on bare metal or on a virtual machine. The ISO contains an installation wizard that automatically installs and configures all the necessary components on the host. This eliminates the need for manual configuration later. The ISO contains the complete feature-set and is available for download.
Additionally, you can install Proxmox Mail Gateway as a container appliance inside Proxmox VE.
For enterprise use, Proxmox Server Solutions GmbH offers a subscription service that provides, at all levels, access to the extensively tested Enterprise Repository. This repository provides regular updates via the web interface and is recommended for production use. At the Basic and higher subscription levels, technical support from the Proxmox team is also available. Subscription prices start at EUR 180 per host per year for unlimited users and domains.
Further information:
Release Notes - https://pmg.proxmox.com/wiki/index.php/Roadmap
Forum Announcement: https://forum.proxmox.com
