Proxmox Mail Gateway is an open source email security platform
The release of the new version of Proxmox Mail Gateway 8.1 and in this new version a series of significant improvements and updates have been implemented ranging from updating the system base, updating rules, support for secure boot and more.
Proxmox Mail Gateway is a proxy server designed to act as a gateway between an external network and an internal mail server, which can be based on MS Exchange, Lotus Domino or Postfix. Its main functionality is to manage all incoming and outgoing email flows. All correspondence records undergo extensive analysis and are available for review through an intuitive web interface. The platform offers detailed graphs to evaluate the overall dynamics of the mail, as well as various reports and forms to obtain specific information about individual mails and the status of their delivery.
What's new in Proxmox Mail Gateway 8.1?
In this new version of Proxmox Mail Gateway 8.1 the base of the system has been synchronized with the Debian Bookworm 12.5 base, In addition to adopting the latest kernel 6.5 and includes ZFS 2.2.2 for efficient data storage and protection management.
One of the notable improvements of this release is the expansion of the rules system, since now Introduced the ability to apply match mode checking on objects and groups, allowing selection of match mode on What/Who/When Object entries, multiple objects in rules, and also spanning multiple objects when checking. This change makes it possible to create complex rules that can, for example, exclude individual recipients, perform flexible scanning of attachments even when the file extension does not match the MIME type, select emails sent from a specific address and containing certain text in the subject, as well as selectively process emails with certain attachments for which spam or virus checking has been activated.
Other major updates to Proxmox Mail Gateway 8.1 are SpamAssassin 4.0.0 with updated rulesets, Clam AV 1.0.3 for detection, and PostgreSQL 15.6 for optimized performance in database management.
In addition to this, it also stands out support for optional generation of DKIM signatures based on the From header, instead of the sender data transmitted during the SMTP session. Additionally, Proxmox Mail Gateway now includes secure boot support, ensuring safe and reliable system startup in critical environments.
Of the other changes that stand out of this new version:
- The web interface has been improved for easier administration in large deployments, with filters and search boxes for relay domains, transport, networks, and objects in the rules system.
- Icons have been added to improve the user experience and several issues related to TLS 1.3-only settings and spelling errors have been fixed.
- Upgrading from previous versions has been simplified, with a focus on warning about potential issues such as missing correct metapackages for the bootloader or out-of-date DKMS modules.
- Known issues such as support for specific drivers have been addressed and input validation in the rules system has been improved for a smoother and safer experience.
- The Postfix configuration has been changed to protect against the SMTP smuggling attack.
Finally if you are interested in knowing more about it you should know that the distribution-specific components are open under the AGPLv3 license and you can check the details in the following link
Download Proxmox Mail Gateway 8.1
If you are one of those who are interested in being able to obtain the new version, you should know that the installation ISO image is available for free download.
Both a paid enterprise repository and two free repositories are available for installing updates, which differ in the level of stabilization of the updates. It is possible to install Proxmox Mail Gateway components on top of already running Debian based servers.