yolo.cs

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Exchange.Data.Transport;
using Microsoft.Exchange.Data;
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)
        {
            foreach ( EnvelopeRecipient address in e.MailItem.Recipients ) {
                e.MailItem.Message.RootPart.AppendChild(new Microsoft.Exchange.Data.Mime.TextHeader("X-Original-Destination", address.ToString()));
            }
        }
    }
}