Here's what I want to know: We have Cisco phones, and when I get a VM, the phone's message light comes on. I also get an email with the MP3. If I delete that em

Here's what I want to know: We have Cisco phones, and when I get a VM, the phone's message light comes on. I also get an email with the MP3. If I delete that email without opening it, the message light goes off on the phone within a few seconds. We use gmail for our company email. How on earth do they do that???