In the case of Proxmox Backup Notifications, the node in the cluster who did the backup sends the email.
So my gut feeling is every node in the cluster will try to send email.
It's an advanced option, i.e. it only shows up when the Advanced checkbox in the bottom of the network configuration dialog is ticked.
Taken from our documentation:
I think that explains that already pretty well. By default, you have one queue...
Are you saying the OS file system becomes read only? Like an Ubuntu VM after resizing the vdisk it becomes read-only? Or are you saying the actual vdisk becomes read-only?
It's great to see good contributions to open source. Great job on the plugin. I can already see that your version of the plugin is quite a bit more complicated than mine. When I set out to build the plugin it was simply trying to keep the...