The Proxmox company, known for developing the Proxmox Virtual Environment distribution for deploying virtual server infrastructures, presented the release of the Proxmox Mail Gateway 9.1 distribution, which is presented as a ready-made solution for quickly creating a system for monitoring mail traffic and protecting an internal mail server.
The installation ISO image is freely available for download. Distribution-specific components are open sourced under the AGPLv3 license. Updates are available from both the paid Enterprise repository and two free repositories, each with a different level of update stabilization. The distribution's system components are based on a package database. DebianIt is possible to install Proxmox Mail Gateway components on top of existing servers based on Debian.
Proxmox Mail Gateway functions as a proxy server acting as a gateway between an external network and an internal mail server based on MS Exchange, Lotus Domino or Postfix. It is possible to manage all incoming and outgoing mail flows. All correspondence logs are parsed and available for analysis via the web interface. Both graphs are provided to evaluate the overall dynamics, as well as various reports and forms to obtain information about specific letters and delivery status. It supports the creation of cluster configurations for high availability (keeping a synchronized standby server, data is synchronized via an SSH tunnel) or load balancing.
A suite of protection tools is provided, including spam, phishing, and virus filtering. ClamAV and the Google Safe Browsing database are used to block malicious attachments, and a suite of anti-spam measures based on SpamAssassin is offered, including support for reverse sender verification, SPF, DNSBL, greylisting, a Bayesian classification system, and blocking based on a spam URI database.
For legitimate correspondence, a flexible filter system is provided, allowing you to define mail processing rules depending on the domain, recipient/sender, time of receipt, and content type.
Main innovations:
- Synchronization with the package database has been completed Debian 13.5. Core Linux Updated to release 7.0. The ZFS file system implementation has been updated to OpenZFS 2.4. The SpamAssassin 4.0.2 spam filtering system, ClamAV 1.4.4 antivirus package, and PostgreSQL 17 database have been updated.
- The web interface for managing the quarantine of problematic emails has been improved. The interface is optimized for both desktop computers and mobile devices. Users can now mark quarantined emails from shared mailboxes as viewed, eliminating the need for multiple people to double-check them. The quarantine report now displays not only the final spam weight but also the positive and negative components separately, for a clearer understanding of why an email was filtered.
An option has been added to load images contained in quarantined emails only after explicitly requesting their display by clicking the "Load Images" button. An option has been added to the admin panel.
"Copy Link" to get a link to access the email that is in quarantine. - Added support for client-side encryption of backups and management of the keys used for encryption. This mode encrypts not only the data being backed up but also associated metadata, such as email settings, filtering rules, and statistics. An optional master key can be specified for recovery.
- Added option to initiate backup verification and view encryption and verification status for each snapshot.
- Support has been implemented for adding announcements that are displayed before entering the administration interface, for example, to display usage notes.
- Added support for saving the sender address transmitted during the SMTP session, as well as the decoded contents of the From, To, and Subject headers, to the log for each email for auditing purposes.
Source: opennet.ru
