internal (private) IP's of Exchange servers being blocked by reputation filtering
I have my Exchange 2010 Hub Transport servers configured to use a Send Connector to route all externally bound email through an IronPort c350 in a smarthost configuration. In troubleshooting an Exchange availability issue, I had a look at this applicance's Incoming Mail stats. In those stats, I see where every hour, 16,000 "inbound" emails are supposedly being stopped by Reputation Filtering:
What most likely is happening is your connection is being throttled because of large volumes of mail. The statistics shows for Reputation Blocking include those connections that are Throttled. You probably want to examine your Mail Flow Policies to make sure that it is 1. a relay policy and 2. that you have allotted enough connections and recipients per message and flow control settings.
On December 8, FireEye reported that it had been compromised in a sophisticated supply chain attack: more specifically through the SolarWinds Orion IT monitoring and management software. The attackers leveraged business software updates in order to distr...
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