Proxmox, known for developing the Proxmox Virtual Environment distribution for deploying virtual server infrastructures, has released the Proxmox Mail Gateway 6.4 distribution. Proxmox Mail Gateway is presented as a turnkey solution for quickly creating a system for monitoring mail traffic and protecting the internal mail server.
The installation ISO image is available for free download. Distribution-specific components are open under the AGPLv3 license. To install updates, both the paid Enterprise repository and two free repositories are available, which differ in the level of stabilization of updates. The system part of the distribution is based on the Debian 10.9 (Buster) package base and the Linux 5.4 kernel. It is possible to install Proxmox Mail Gateway components on top of already running servers based on Debian 10.
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 complete set of protection, spam, phishing and virus filtering is provided. ClamAV and Google Safe Browsing are used to block malicious attachments, and a set of measures based on SpamAssassin is offered against spam, including support for reverse sender verification, SPF, DNSBL, greylisting, Bayesian classification system and blocking based on spam URIs. For legitimate correspondence, a flexible system of filters is provided that allows you to define mail processing rules depending on the domain, recipient / sender, time of receipt and content type.
Main innovations:
- The web interface has an integrated tool for creating TLS certificates for domains using the Let's Encrypt service and the ACME protocol, as well as for uploading self-generated certificates.
- The SpamAssassin spam filtering system has been updated to release 3.4.5 and the ability to deliver verified updates to blocking rules has been added.
- Improved interface for managing quarantined spam messages. Added the ability to display all quarantined messages in the admin interface.
- The ability to view information about outgoing connections established using TLS has been added to the interface for viewing logs.
- Improved integration with the backup infrastructure based on Proxmox Backup Server, added the ability to receive email notifications about backups.
Source: opennet.ru