How can I test outgoing e-mail?

I have a controller that sends e-mails, e.g. when a user has forgotten his password. What is the best practice for testing e-mail? I want to know how the e-mail message looks like before it goes live. So I'm looking for a way to test it on my localhost (wamp) or watch the result on my screen.
I've tried:

PHP Code:

$this->email->print_debugger(); 


but it always shows a blank screen. What am I doing wrong here?

If you want to use CI Email Class, there is not need to use other tools, mail server, libraries or...!
I use CI Email Library, test all the things in the localhost (wampserver), sned email and all work correctly.