The link is visable on mine but when you click on the "Send email" you find that it says:
"You are not authorized to view this page!
You need to log in."
Can anyone help? There is a module called Public Mail (visitors can email registered users)which might help you. It is for another version of C.B than mine and may not be compatible as I am runing Joomla 1.0, I don't know. The link is bellow.
www.joomlapolis.com/component/option,com_mtree/task,viewlink/link_id,32/Itemid,55/
It even has a Captcha, looks nifty