Something is corrupt that’s for sure. I can at least change the hostname, I’ll make a mailbox “asterisk”
There is absolutely nothing ever configured to use [email protected] for the voicemail, and there’s only a few articles I’ve found describing this issue with no resolve.
Second are you using the Debug feature of Sysadmin Pro/Email Setup to test? If so it looks like that will always use [email protected] as the from address. However when emailing an actual voicemail the from address shows up correctly