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:
internal (private) IP's of Exchange servers being blocked by rep
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.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...