3. "Hey, this is [your name]. If you're calling for [X reason], please [contact so-and-so] or [go to our website, send me an email]. For all other inquiries, leave your name and a brief message and I'll call you back within [one, two, three] business day[s].
To end the voicemail, state (or restate) your main question, then say your phone number. You can also say you’ll follow-up with an email. Now, this isn’t the same as saying, “If I don’t hear from you, you’ll hear from me!” Instead, it’s giving them another way to contact you, one they may be more comfortable with. They should still feel a responsibility to respond to your question, but now they have two options for how to get back in touch. (Then send that email, of course.)

Most people screen their phone calls and often avoid answering unknown numbers. If you’re applying for new positions, you should try to view each unexpected call as an exciting opportunity! In the event that you simply can’t pick up the phone, you’ll want a polished voicemail greeting to let the caller know they’ve reached the right person.
There's no doubt about it -- leaving a good sales voicemail is hard. And even if you do record a well-crafted message, do prospects actually listen to them, or take the time to call you back? Not usually.