Purchased the VM Notify module today and set up one notification. The list has 3 numbers in it prioritized as 1, 2, and then 3.
A voice mail is left, priority 1 is called. Recipient accepts the message and the system hangs up the call. A success email is sent saying that the recipient has accepted. After the timeout has been reached, it then calls recipient priority 2. That recipient does not answer, so after a second retry and no answer, it then called recipient priority 3. This recipient then accepted and a success email was sent. After another retry timeout span, it started over again, calling recipient priority 1.
I then had to remove all numbers from the list to force it to quit and it then sent a failure email.
During this entire time, the voice mail was not in the mailbox anymore.