Proxmox Mail Gateway 9.1 Is Out with New Features. Anyone Running PMG?

Just saw that Proxmox has released Proxmox Mail Gateway 9.1.For anyone not familiar with it, Proxmox Mail Gateway is the email security product in the Proxmox ecosystem that sits in front of your mail servers and helps filter spam, malware, phishing attempts. Really any other unwanted email traffic before it reaches users.

A few of the highlights in the 9.1:

• Based on Debian 13.5

• Linux kernel 7.0

• SpamAssassin 4.0.2

• ClamAV 1.4.4

• PostgreSQL 17

• ZFS 2.4

• Improved spam quarantine management

• Encrypted backup support

This doesn't look like a huge feature release to me, but seems like a solid platform update that keeps the underlying components current with a few quality-of-life improvements.

The spam quarantine enhancements are probably the feature that will be most noticeable to day-to-day users and administrators. Anything that makes reviewing and releasing quarantined messages easier is probably a good change. It looks like it also adds encrypted backups which is nice to see, especially for orgs that need more protection for configuration and messaging-related data.

One thing I've always found interesting is that Proxmox Mail Gateway doesn't seem to get nearly as much attention as Proxmox VE. Even though I think it is a really mature product that has been around for quite a while. Most of the discussion in the home lab and self-hosting communities naturally centers around virtualization, containers, and storage, but email security is still critical service for many organizations.

For anyone already running PMG, this looks like a worthwhile update. Is anyone here currently running Proxmox Mail Gateway in production or in a home lab? If so, what mail platform are you protecting with it, and how has your experience been compared to solutions like Mimecast, Proofpoint, Barracuda, or Microsoft Defender for Office 365?