After you have stated in your business voicemail greetings what you want the clients and customers should do when leaving a message, it is important to remember that you keep your voicemail messages short and concise. Use smaller and simplified words rather than business jargon your customers will not understand.
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.

A great business voicemail greeting will inspire your customer to leave a message rather than hang up, or get them to go somewhere else where they can get a more immediate response from your business.
Go under the [Reseller System Configuration] Tab, and on the section "Type of configuration" select: [Package Configuration], 1) To add a new voicemail for your client, or to help your client adding one. Go under the [Services] at the left navigation bar, then on [Voicemail]. .