SMTP Managed Event Sink for scanning incoming emails

I want to scan all incoming mails using Managed Event sink. I am implementing IMailTransportSubmission Interface.

void IMailTransportSubmission.OnMessageSubmission(
MailMsg message,
IMailTransportNotify notify,
IntPtr context)
{
try
{
// Fill details of the Message in database
FillData(message);
}
catch (Exception ex)
{
EventLog.WriteEntry(
Assembly.GetExecutingAssembly().FullName,
ex.Message + "\n" + ex.StackTrace.ToString(),
EventLogEntryType.Error);
}
finally
{
if (null != message)
Marshal.ReleaseComObject(message);

}
}

I am using following command to bind the event sink:

cscript smtpreg.vbs /add 1 OnTransportSubmission "MyEventSink.ManagedSink" MyEventSink.ManagedSink.Sink "MAIL FROM=*" 28001

I have a development exchange server. When I put a message in “pickup” directory, a entry for this message is inserted into database. That means my event sink working fine, but I am not sure how to test it for incoming message as this development exchange doesn’t have dns entries and I have to check event sink functionality for incoming mail from same development server somehow. First thing I want to know that whether I have implemented correct interface for scanning incoming mails. Two, whether I have registered correct event for incoming mails.