A general voicemail greeting is what callers will be greeted with if you are unable to answer the phone at work. It is the everyday greeting, used as the default, unless you have set up a temporary greeting, such as an away message while you're on vacation, or a special message during a holiday.
4.) Benvenuti dal Signor John Doe. Il Signor Doe non è in ufficio. Si prega di lasciare un messaggio e il Signor Doe vi richiamerà al più presto possibile. Grazie per la vostra chiamata.

Whether you’re out for the day or are off for the week, the first rule of an out of office voicemail greeting is: let callers know when you’ll be back! You’ll save them the frustration of continuing to call and yourself the hassle of listening to redundant voicemails. It’s also a good idea to set the expectation of whether you are answering messages while you’re away, and who they can reach for assistance in your absence.
Shut the office door and turn down the music—it’s time to record! Pretend that your office is your music recording studio as you prepare to vocalize your message. Remember that obscene background noise can be a major turn off to potential customers and prospects.