There are some industries or situations where Voicemail to Email might not be an option. For example, healthcare organizations must adhere to HIPAA regulations, and email generally isn’t HIPAA compliant. (The VBC app is HIPAA compliant.)
Note that there is a configuration option that can be set up by Vonage support that will send the email as a notification only, without the voicemail itself. The user may then listen to the voicemail in their desktop or mobile app or by entering the inbox code.