Yesterday I migrated my mailcow setup to new hardware. Before the migration I upgraded the old server to the most current mailcow software. I used the rsync method as described in the documentation and everything came back up fine on the new server. This morning I noticed a lot of spam that normally would have been rejected or gone into the junk folder in my inbox.
Looking at the spam I noticed that there where no headers added. Looking at the rspamd logs I noticed that the last entry is for an email that came through shortly before the old server was shut down yesterday.
I am not sure where to go from here in fault finding this. Any advice would be appreciated. I still have a backup (proxmox) of the original working system as well as the upgraded system on the old server i can do some testing with.