Recover deleted voicemails?

Is it possible to recover a voicemail if its been deleted from an inbox?

When deleted they are gone, when read they are moved to the old folder, perhaps consider rsnapshot running every half hour in business hours. If you go rsnapshot, only recover a complete INBOX to an empty INBOX or better wiuld be to sanely rename the voicemail to be restored with respect to a possibly not empty current INBOX.