Problems with mail

Hi, I have this very straight forward code to send an e-mail: $subject_users_subscription_confirmation = "Subscription confirmation"; $message_users_subscription_confirmation = 'Please, click this link to confirm your subscritpion: http://www.telbit.pt/subscribe-confirm.php?email=' . $email . '&conf=' . $barfles; mail($email, $subject_users_subscription_confirmation, $message_users_subscription_confirmation); The three variables are ok, as i debuged them with prints, but no mail is sent. If i do a test with mail('gamito@gmail.com', 'Hello', 'Hello'); then the mail is sent ok! I'm driving nuts here. Can someone give me a hand on this, please ? Warm Regards -- :wq! Mário Gamito