Here's a copy and paste from a test 'tell a friend' email to myself:
Hi,
I just read the topic >>Pruning Old Topics<< at Motleyville and thought
you might be interested. Here is the link:
http://motleyville.com/bb/portal.php?topic_id=2052
Go and read it and if you want to reply you can register for your own account if you
have not done so already.
The link goes to the portal page with the topic opened fully.