I have searched and read, and searched some more. I can’t figure out how to change the email attachment from a WAV to a .wav. Apparently it makes a difference. Sorry for being a newb, but I did try searching.
http://www.voip-info.org/wiki/view/Asterisk+config+voicemail.conf
Look in the “format” section.
edit /etc/asterisk/voicemail.conf
[general]
; 1st listed format gets emailed
format = wav ; for voicemail try to send better quality wav file
for email:
edit /etc/asterisk/vm_general.inc
format=wav