Egress Software has developed a highly flexible transport agent that supports Microsoft Exchange 2007, 2010, 2013 and 2016

Since the release of Microsoft Exchange 2007 there have been significant changes to the internal configurations available for system administrators. Exchange 2007/2010/2013/2016 offers significant scalability and flexibility enhancements over previous versions.

Changes to how complex routing rules are implemented mean this now occurs by creating transport agents on both hub transport and edge servers. Transport Agents are compiled DLL codes written to perform specific tasks.


The transport agent is often used in conjunction with Switch Gateway but can also perform the following tasks, useful in standard email configurations:

Header-based routing: Route email based on header information. For example, routing mail that contains defined email X-header information to a specific location or smarthost

Address-based routing: Conditional email routing based on From address and/or To address

Address rewriting: Rewrite the From address based on destination domain

Message splitting: Split single messages into multiple based on recipient addresses and route based on policy

Add Header: Add new headers to email based on policy


  • Supports Microsoft Exchange 2007, 2010, 2013 and 2016
  • Installation on hub transport or edge servers
  • Full text based search strings supported in email headers and attachment names
  • Route messages based on complex policy rules via send connectors or direct SMTP connection
  • Rewrite email headers, From address and other mail identifiers
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