Exchange Server 2007 Transport Agent Issue

Question

This is the first time i am working on Exchange Server Development. Below is a simple Transport Agent that i am using, this agent should simply update the email Subjects
as shown below in the code.
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Exchange.Data.Transport;
using Microsoft.Exchange.Data.Transport.Smtp;
namespace MyAgents
public sealed class MyAgentFactory : SmtpReceiveAgentFactory
public override SmtpReceiveAgent CreateAgent(SmtpServer server)
return new MyAgent();
public class MyAgent : SmtpReceiveAgent
public MyAgent()
this.OnEndOfData += new EndOfDataEventHandler(MyEndOfDataHandler);
private void MyEndOfDataHandler(ReceiveMessageEventSource source, EndOfDataEventArgs e)
e.MailItem.Message.Subject = "This message passed through my agent: " + e.MailItem.Message.Subject;
Below is the Powershell script i am using to install the Agent.
Net Stop MSExchangeTransport
Install-TransportAgent -Name MyAgent -AssemblyPath EmailLogger.dll -TransportAgentFactory MyAgents.MyAgentFactory
Enable-TransportAgent -Identity MyAgent
Net Start MSExchangeTransport
Agent installed successfully using Exchange Management Shell.
Now when i send/receive emails in exchange, Email subjects are not modified. Emails have their original subjects. I don't know why?
I also performed the steps mentioned in below links to debug the Agent but breakpoints are not being hit by Visual Studio Debugger.
sf-tools.net/Messaging/tabid/55/EntryId/163/Exchange-2010-Transport-Agent.aspx
stackoverflow.com/questions/12347123/debugging-ms-exchange-2007-transport-agent
omarjames.com/blog/index.php/debugging-exchange-transport-agent/
My System Configuration
I am using the Exchange Server 2007 Virtual Machine provided by Microsoft from link below
microsoft.com/en-pk/download/details.aspx?id=14901
I also installed the Visual Studio 2008 on the VM for debugging.
Please help me in resolving the issue?

Answer 1

How are you testing this ? a SmtpReceiveAgent will only fire when the server receives email over SMTP. So if your just logging on and sending an Internal Email (eg mailbox to mailbox) or sending Email externally then the
SmtpReceiveAgent wont fire. For a single server if you want to capture all email you need to use a router agent see
http://blogs.technet.com/b/postwoman/archive/2010/09/14/step-by-step-how-to-create-a-routing-agent.aspx
. If you want to test what you have try sending an email to mailbox over SMTP using an SMTP client or Telnet
http://exchange.mvps.org/smtp_frames.htm
Cheers
Glen