This is a weird one. I noticed when I was installing OMV v5.3.4 that when it got the screen where you choose the hostname and it had already entered "ChristiesiPhone". I'd also noticed a previous time when instilling the v5 beta that it named itself Ubuntu. Anyway, I chose a different hostname for the server and finished the install.
Just now I finished setting up the SMTP server settings to enable notifications, and the test email read as "[ChristiesiPhone.localdomain] Test message from blah.blah"
I should mention that I believe this device name was for an iphone on my network years ago, but no longer.
How do I fully change the system name? Also why would the installer pull that random old name?