When you’re using the traditional voicemail system, your carrier dictates some messages you’re going to store in your voicemail box. But with a virtual system, you can store and retrieve messages whenever you want. The cloud also allows you to convert the voicemail audio files and texts and send them via email to relevant departments for further screening.
Of course, we want to know as soon as an incoming voicemail is saved, so again, it’s Twilio to the rescue. By adding a few lines of code to our Python script, Stacey and I each get an SMS notification telling us there’s a new message. Note that Twilio’s API requires a separate call for each message to be sent, which is why the similar code repeats once for Stacey’s phone number and then again for mine. If you plan to send bulk messages from Twilio, I expect that you can build a list of phone numbers and loop through them with the API call. Since we only have two contact numbers and don’t expect to add any more, I decided not to loop through a list of two elements.

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Website: https://www.garamgroup.com/tips-after-hours-business-voicemail-auto-attendant-greetings/