If you only want to put the contents of a reply in your e-mail, download this hack.
Ignore everything till "Go to admin cp and edit the 'email_notify' template". Then, obviously, only put in $message in the template where you want the text to be.
Ignore everything starting with "Then you just need to run mailreply.php every 10 minutes or so."
This way, your users can read replies but not post anything without returning to the site.
For an example of the e-mail you might get, see
http://forums.mediauk.com/showthread...threadid=15339