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How to Create a CatchAll Mailbox in Exchange 2007 (CatchAllAgent)

CatchAllAgent is an Exchange 2007 Transport Protocol Agent. If a message comes in, and a
recipient of that message does not exist (unknown recipient), the recipient typically gets
rejected by the Recipient Filtering feature (which is also a Transport Protocol Agent).

The CatchAllAgent can be configured to rewrite the recipient address for unknown recipients
such that such messages end up in a dedicated mailbox. The configuration allows for multiple
domains, but you can only specify a single target address for each of those domains.

Read the complete guide here -> http://www.petri.co.il/setting-up-a-catchall-mailbox-in-exchange-2007.htm

Thanks to Wilbert De Graaf for creating the agent.