Well this is a psuedo approach.
When the form recieves a Final Submit then get the e-mial address of the person who posted the original message and use this Mail code as a start.
<% ' Email results to poster
Set Mail2 = Server.CreateObject("Persits.MailSender"

Mail2.Host = "smtp.yoursite.com" ' Specify a valid SMTP server
Mail2.From = Email_of_Poster ' Specify sender's address
Mail2.FromName = Name_of_Poster ' Specify sender's name
Mail2.AddAddress "partssales@universal1.com"
'Mail2.AddAddress "dposton@ij.net"
Mail2.Subject = "Reply form your Site"
msg = Name_of_submitter & " has posted a response to your " & Subject_of_Current_Post
Mail2.Body = msg
On Error Resume Next
Mail2.Send
If Err <> 0 Then
Response.Write "Error encountered: " & Err.Description
End If
%>
Note: this assumes your site is using "Persists" E-mail.
I cut this code out of a submit form we are using right now its not doing exacly what you are but [sig]<p>DougP, MCP<br><a href=mailto: dposton@universal1.com> dposton@universal1.com</a><br><a href= > </a><br> Ask me how Bar-codes can help you be more productive.[/sig]