I read that this tag displays the name of the auther of the post

<a href="mailto:<?php $Item->Author->disp('email'); ?>"><?php $Item->Author->prefered_name(); ?></a>

But where must i put it and what other things must i do ?

And how do i put a email code in my post because i don't get the email link in the post.

so as somebody clicks my name in the post they can email me

gr