Lunar Threads

I've been trying to set up a phpBB forum for my college class, and it was working pretty fine, but for some reason the email never works. If i try the option of the php mail() it says the email was sent but it never really goes. If i use the SMTP it gives me an error that the he couldn't contact the smtp host.
I tried many smtp servers, and it keeps saying that, above a DEBUG MODE smtp.php line 112 error.

Can someone help me? someone who knows how to ix this in phpBB? Please, i'm really lost, cause noone can register at there because an email confirmation is needed.

I was never able to figure it out myself. I think Insydius figured it out for this board, but he's been MIA for a bit.