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.
Internal Greeting: Turn on this greeting when you want to provide information coworkers might need to know. (For example, "I will be in conference room B until noon today.") When it is on, the internal greeting overrides the standard and closed greetings, and plays only to callers within your organization when you do not answer your phone.

The following voicemail greeting examples range from the brief and simple to the more detailed. You should choose the one that best suits your job and responsibilities as well as your personality. Before recording your message, you should also make sure to adhere to the basic elements of good voicemail greetings. basic elements of good
Website: https://www.thevoicerealm.com/blog/how-to-record-a-professional-voicemail/