Your mailbox will appear under Voicemail Accounts after it is created through your Customer Portal>>DID Numbers>>Voicemail page. In there, you can click the Delete button to delete the mailbox completely or Delete Msgs to delete all of the messages in the given mailbox.
I have a confession to make: I haven’t recorded a new voicemail greeting since 2014. In the past four years, I (hopefully) have become more articulate, poised, and self-assured. But hear my voicemail recording, and you’d think I was still new to the work world, a little unsure of myself — and probably not an authority. Obviously I need toupdate it. And if you haven’t changed your voicemail greeting in over a year, you’re likely in the same boat. After all, a professional voicemail recording boosts your credibility, makes you seem more competent, and encourages whoever’s listening to it to continue the relationship. A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction. With that in mind, I’ve written 18 unique voicemail greetings for every situation. Pick your favorite, practice a few times, then record your new voicemail.

Hi, you’ve reached the home of [name]. If you are calling to collect a student loan, gambling debt, or other obligation, please press 1 and hang up now. If you are selling any product or service, or requesting charitable donations, please press 2 and hang up now. Otherwise, press 3 and leave your message now. Pressing 3 is optional.
When your business is closed for vacation or holidays, it’s imperative that you set appropriate expectations for a callback and to provide an alternative coverage option, if available. The following greeting accomplishes this succinctly.