UPDATE 6/30/15 12:13p The mail team reports that the queues are mostly empty, things should be back to normal.
UPDATE 6/30/15 11:10a The mail team reports that CNS has resolved the underlying issue, however queues are still backed up, but are emptying.
The mail team is reporting that they are seeing mail delays. They report that the work being done on the new load balancer systems has affected ipv6 routing, which is causing significant queuing. They are actively working with CNS to resolve the issue.