Proxmox, a company known for developing the distribution for deploying virtual server infrastructures, the release of the distribution . Proxmox Mail Gateway is presented as a ready-made solution for quickly creating a mail traffic control system and protecting the internal mail server.
Installable ISO image for free download. Distribution-specific components under the AGPLv3 license. For installing updates, both a paid Enterprise repository and , which differ in the level of update stabilization. The system part of the distribution is based on the Debian 10 (Buster) package base and Linux kernel 5.3. installation of Proxmox Mail Gateway components on already running Debian 10 servers.
Proxmox Mail Gateway operates as a proxy server acting as a gateway between the external network and the internal mail server based on MS Exchange, Lotus Domino, or Postfix. It provides the ability to manage all incoming and outgoing email traffic. All email logs are analyzed and can be accessed through a web interface. Both graphs for assessing overall dynamics and various reports and forms for information on specific emails and delivery status are provided. Cluster configurations are supported to ensure high availability (maintaining a synchronized backup server, with data synchronized via SSH tunnel) or load balancing.
A full set of tools is provided to ensure protection, spam filtering, phishing, and viruses. To block malicious attachments, ClamAV and the Google Safe Browsing database are used, and for spam, a comprehensive set of measures based on SpamAssassin is offered, including support for sender verification, SPF, DNSBL, greylisting, Bayesian classification, and blocking using a spammer URI database.
For legitimate correspondence, a flexible filter system allows setting processing rules based on domain, recipient/sender, time of receipt, and content type. It is possible to manage all incoming and outgoing email traffic. All correspondence logs are analyzed and available for review through the web interface. Both graphs for assessing overall dynamics and various reports and forms for obtaining information on specific emails and delivery statuses are provided.
Key :
- Support for generating DKIM (DomainKeys Identified Mail) digital signatures for outgoing emails has been added. A web interface is provided for configuring the application of DKIM, allowing it to be enabled only for specific domains;
- A new system has been added for quarantining remote attachments, for instance, after detection of viruses or malware. Instead of deleting such attachments, they can now be postponed along with the emails for subsequent analysis by the administrator;
- A web interface has been proposed for configuring the weights of various spam filtering criteria in SpamAssassin. Weight changes can be made on the level of individual rules, allowing for the adaptation of the anti-spam system to the specifics of the current environment. It is also possible to selectively disable rules that lead to false positives;
- An experimental filtering mode has been added at the SMTP session stage before queuing the message ('Before Queue'). This mode is incompatible with the Tracking Center;
- Improved handling of settings and rules in clustered environments. The filtering engine is now informed of changed settings that require a configuration reload, reducing the number of situations that necessitate a manual restart of pmg-smtp-filter. Notifications of changes are transmitted during cluster synchronization;
- The distribution has been synchronized with the Debian 10.2 package base. The Linux kernel has been updated to release 5.3, borrowed from Ubuntu 19.10.
Source: opennet.ru
