Failed in reading Connector's DS Info Process Id: 1100 Process location: C:\WINNT\System32\inetsrv\inetinfo.exe ConnectorDN: CN=External Mail,CN=Connections,CN=First Routing Group,CN=Routing Groups,CN=First Administrative Group,CN=Administrative Groups,CN=APM,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ad,DC=apm,DC=net,DC=au Hr:80040920 Attribute:[]

A non-delivery report with a status code of 5.3.0 was generated for recipient rfc822

Message delivery to the remote domain 'somedomain.com' failed for the following reason: Unable to bind to the destination server in DNS.

The categorizer is unable to categorize messages due to a retryable error.