In theory there is no safe way to upgrade if you don't remember what you did on a system. But I'd say that most changes should be preserved if you upgrade in place and carefully compare the configuration changes the upgrade process asks you...
We have implemented several modifications to enhance spam detection, most of which were inspired by discussions on this forum. I’m concerned that I might lose these changes, as I no longer remember exactly what I did. :))
We are pleased to announce the first stable release of Proxmox Mail Gateway 9.0 - immediately available for download!
Twenty years after its first release, the new version of our email security solution is based on Debian 13.1 "Trixie", but...