Since yesterday, we have notice emails queuing up that should be delivered to access.ironport.com. The emails are release notification from Spam Quarantine and user Report Spam. I have ran the diagnostic test from the CLI and it attempts to resolve to c602-nl.ironport.com (IP 18.104.22.168) but is unable to connect. I have also tested from MXToolbox website and receive the same message.
Anyone else experiencing this issue?