MPLS end users are not receiving voicemail to email notifications sent by 8x8.
- Voicemail email notifications
Add packet8.net, 8x8.com, and 8x8 US subnets to MPLS rules that will prevent mail traffic from traversing MPLS. For more information, see the section on allowing traffic to and from 8x8 subnets in Configuring Your Network for VoIP Services.
8x8 sends out mail server requests via the public internet. The responses passed through MPLS may create an asynchronous connection which would prevent emails from being delivered to the end user.