MailMessage .NET capabilities

I have a problem that I need a solution to, who doesnt right!!! But here
goes. I have an application that generates a mailmessage and actually stores
the message on a public folder of outlook.
Now I need to be able to access this email again. But the problem is that I
dont have a unique id for it. I know that emails generate a message id in the
mailserver.
Is there any way to capture this message id???

Thanks.