exchange-transport-agents

Editing an SMTP header with an Exchange 2007 Transport Agent

I'm currently writing an Exchange 2007 Transport Agent to replace some headers in all outgoing mails from a particular sender. I managed to replace the 'From' SMTP header successfully, but rewriting the 'Return-Path' header does not seem to work. To make this all happen, I have written a custom SmtpReceiveAgent and subscribe to the OnEn...

Does anyone know how to prevent Exchange 2010 unloading transport agents?

In Exchange 2007 transport agents (e.g. RoutingAgents) were loaded and remained loaded until the transport service shutdown. In Exchange 2010 this behaviour seems to have changed so that agents are unloaded. I'm not sure what the criteria for unloading the agent are, but it seems to happen very rapidly and frequently even when there is ...