Voicemail notification email's aren't going out. I don't recall configuring any smtp settings to send them out though, and I can't find wherever they would be.
Where can I find these settings?
The pbx uses postfix. You can edit most of the config via webmin.
Watch your mail log
tail -f /var/log/maillog
from bash shell as root do:
that will tell you if they are still spooled up on your server. If they are not read through your maillog to see if the connecting mail server(s) are accepting or rejecting your mail. You could be flagged as spam etc.
Thirdlane/Asterisk Support available