How the Transport Dumpster works with a CCR cluster

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Matt Richoux has explained to us how the Transport Dumpster configuration works in a Exchange Server 2007 CCR Cluster. There are some important points that we can resume as it follows:

  • Dumpster works only with CCR implementation
  • The maximum size of the Transport dumpster queue per storage group is for all the storage groups
  • To disable the dumpster we should define to 0
  • the cmdlet used to define is set-transportconfig
  • an eventid 2099 will appear when a failover event occurs
  • the recommended size of MaxDumpsterSizePerStorageGroup should be 3 times more than the maximum message size
  • when the limit is reached the first in is the first out

Transport Dumpster is a new feature of Exchange Server 2007 Hub Transport servers through which the transport can defer the deletion of certain emails in their queues. The condition for an email to be retained in the transport dumpster is that at least one of the recipient’s mailboxes must resides on a CCR mailbox server. This retained email can later be re-delivered if necessary. The amount of mail retained in the queues is a Organization wide setting on the Transport Settings container.

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Written by Anderson Patricio

Anderson Patricio is a Canadian Exchange Server MVP and MCSM (Solutions Master) and he contributes to the Microsoft Community with articles, tutorials, blog posts, forums and book reviews. He is a regular contributor at, and (Portuguese).