Anyone ever get a solution to this? I am having exact same issue on my 15 system. FPBX 15.0.16.38 and Asterisk 13.27.1.
Correct address is setup in email setup, and in voicemail config. It exists correctly in the /etc/asterisk/voicemail.conf file. I’ve tried adding aliases in both /etc/postfix/generic and in /etc/aliases.
In the SMTP dump, it keeps showing it’s trying to send with “asterisk@fqdn” and not the address configured to be used, which is subsequently getting bounced by O365 SMTP as asterisk@ isn’t an allowed send-as for the email account being authenticated with. I could add asterisk@ with send-as permission, but that’s a bandaid for the root problem here that I’d like to get sorted.
I have dozens of other systems out there all working correctly. I am unclear what the difference is on mine, OTHER than I am on 15. All other notices from FPBX itself go out properly with the correct from address, it’s ONLY voicemail that is still trying to use “asterisk@fqdn” as it’s from address.