Having trouble getting email notifications of voicemail

Hello,
Thank you in advance for the help.
The box is completely set up with:
Asterisk 1.6.2.14
FreePBX 2.8.0.4
Sendmail seems to be configured properly as i can send email from the box manually.
Email notifications of voicemails are not sent.
Sendmail log is empty.
Unfortunately, I do not know enough of how the integration between FreePBX and sendmail works to troubleshoot the problem. Any help would be appreciated.
Thanks!