Email Delivery to a Distribution Group and message tracking that email
Posted on 2014-04-23
This is a very odd situation and it involves two somewhat related issues.
1. We are using Proofpoint for a SPAM filter and have had no major issues until I recently created 4 mail enabled security groups. I was informed that external emails were not being delivered to these groups. I performed a search on our Proofpoint site, found the emails in question, which had a Status of sent. The MTA log shows me that it has indeed been delivered to our CAS server (Hub Transport). As far as I can tell, this is only occurring with groups which have been created since we started using Proofpoint. All pre-existing groups are functioning correctly. But Proofpoint points to the fact that message is being sent and is telling me it's not their problem and I need to track the message internally.
2. Whether I run a powershell command (get-messagetrackinglog etc. ) or run the exchange troubleshooting assistant, using the SPECIFIC Internal message ID number. I always get back no results found, which is impossible.
ANy thoughts would be appreciated.