Click on the Settings tab under the Settings > Messaging categories.
Click on the check box for “Auto-forward all voicemail messages” and enter an email address.
Click Apply to finish the configuration.
Note: As an alternative to auto forwarding, you have the option to have new message notifications sent to your email address. The system will alert you via email that you have a new message, but it will not send a copy of the message. To activate this setting, click on the Email tab under Settings > Messaging.