Proxmox Mail Gateway 6.0 beta released!


Proxmox Staff Member
Staff member
Apr 28, 2005
We're really excited to announce the first beta release of Proxmox Mail Gateway 6.0! The full release notes will be available together with the final release announcement.

Here are the highlights
  • Based on Debian 10 Buster
  • Updated SA rules
  • Updated kernel (5.0.18) and include latest security fixes
  • Improved installation with ZFS on EFI and/or NVMe
  • Upgrade path from 5 to 6
  • Bug fixes and improvements


Community Forum

Source Code


This release is a beta version. If you test or upgrade, make sure to create backups of your data first.

Please help us reaching the final release date by testing this beta and by providing feedback via


Q: Can I do an inplace-upgrade from Proxmox Mail Gateway 5.2 to 6.0?

A: Yes, please follow exactly our upgrade documentation on

Q: Can I upgrade from the Proxmox Mail Gateway 6.0 beta to the final 6.0 release with apt?
A: Yes.

Q: Which apt repository can I use for Proxmox Mail Gateway 6.0 beta?
deb buster pmgtest

Q: When do you expect the stable Proxmox Mail Gateway 6.0 release?
A: The final Proxmox Mail Gateway 6.0 will be available as soon as release critical bugs are fixed.

We hope you will like the new Proxmox Mail Gateway 6.0 and are looking forward to your feedback.

Best regards,

Martin Maurer
Proxmox Mail Gateway project leader
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Question: During upgrade config files get changed and I'm asked if I want to keep the current or switch to the maintainer version. I checked all configs (old and new versions) and it's normally quite clear which settings can be changed and which one should be left untouched.
One exception: The Clamav config files (freshclam and clamd) have a big difference between old and new. For now I left the old ones.
Any suggestions? Should I try and merge old and new, is it safe to take the new ones (maybe better security, etc...)?

I got the following error when trying to upgrade to 6 in place:

root@uhhepgw:/etc/apt# apt update
Hit:1 buster InRelease
Hit:2 buster-backports InRelease
Hit:3 buster-updates InRelease
Hit:4 buster/updates InRelease
Ign:5 buster InRelease
Err:6 buster Release
404 Not Found
Reading package lists... Done
E: The repository ' buster Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I replaced stretch with buster in the sources.list and the pmg file in sources.list.d. I also have a valid subscription. Thank you for the help.


Is there a document for version 6? Thanks.


First note that Proxmox Mailgateway in version 6 is not yet released, thus not all repositories are yet available.
If you want to test 6.0 or the upgrade to it you need to add the "pmgtest" repository:

# echo "deb stretch pmgtest" > /etc/apt/sources.list.d/pmg-test.list

You can comment out the line in /etc/apt/sources.list.d/pmg-enterprise.list for now, but the error is harmless.
Thank you Thomas. Everything worked out ok after Promox support said it is not released and uses the test repo.


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