Change the voicemail sender address

How to change the default sender address for the voicemail

Step-by-step guide

Asterisk uses the default postfix configuration to send the voicemail message.

Edit the file /etc/postfix/main.cf and set the parameter myorigin with your email address as follows:

/etc/postfix/main.cf

# SENDING MAIL
# 
# The myorigin parameter specifies the domain that locally-posted
# mail appears to come from. The default is to append $myhostname,
# which is fine for small sites. If you run a domain with multiple
# machines, you should (1) change this to $mydomain and (2) set up
# a domain-wide alias database that aliases each user to
# user@that.users.mailhost.
#
# For the sake of consistency between sender and recipient addresses,
# myorigin also specifies the default domain name that is appended
# to recipient addresses that have no @domain part.
#
#myorigin = $myhostname
#myorigin = $mydomain
#
# MY CONFIG (customercare@mycompany.com)
myorigin = customercare
myorigin = mycompany.com

Save the file and restart the postfix service:

service postfix restart