UNGH! THAT sucks.
You’ve had it for how many years, now?
Our “house” email address is more than 20 years old; it outlived Thunderbird. I have email archived on my NAS going back to 2000-2001.
Big shift to Outlook a few years ago, and I now create individual Archive files for each successive year, and back them up on the NAS; a Western Digital box running dual drives in a Level 1 RAID array. That “mirrored” configuration has proved satisfyingly safe.
I hope you can make contact with “The Guy Who Knows What’s Really Going On” and get your email account fully restored to service. When they do, I know what my very next arduous, but crucial, project would be. For that purpose, I recommend at least a dual drive Synology “Disk Station.” Much as my Western Digital unit has proved its worth, the Synology product just offers SO much more.
This account?
Since the lat time the cicadas swarmed...