Custom Transport Agent for Address Rewrite

Hi All, 

I have done a lot of research on writing a code for custom Transport Agent.

What I need to achieve is that one of Linux server sends an email @linux.com through our Exchange system here and I'd like the receiver will get @domain.com instead of @linux.com. Because there are a couple users in that domain, so whoever sends from this linux.com will get changed (@domain.com) at the destination. 

From my research and modify the codes from number of websites

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Microsoft.Exchange.Data.Transport;
using Microsoft.Exchange.Data.Transport.Email;
using Microsoft.Exchange.Data.Transport.Smtp;
using Microsoft.Exchange.Data.Transport.Routing;
using Microsoft.Exchange.Data.Common;


namespace RoutingAgentOverride
{
    public class SampleRoutingAgentFactory : RoutingAgentFactory
    {
        public override RoutingAgent CreateAgent(SmtpServer server)
        {
            RoutingAgent myAgent = new ownRoutingAgent();

            return myAgent;
        }
    }
}
public class ownRoutingAgent : RoutingAgent
{
    public ownRoutingAgent()
    {
        //subscribe to different events
        base.OnResolvedMessage += new ResolvedMessageEventHandler(ownRoutingAgent_OnResolvedMessage);
    }

    void ownRoutingAgent_OnResolvedMessage(ResolvedMessageEventSource source, QueuedMessageEventArgs e)
    {
        try
        {

            if (e.MailItem.FromAddress.DomainPart.Contains("linux.com"))
            {
                e.MailItem.FromAddress = new RoutingAddress("Localpart", "domain.com");
                e.MailItem.Message.From.SmtpAddress = "localpart" + "@" + "domain.com";
                e.MailItem.Message.Sender.SmtpAddress = "localpart" + "@" + "domain.com";


            }
        }

        catch 
        {

        }
    }

}

I have not tested, would it work?

Thanks