Mail sending problem

[eluser]ummarbhutta[/eluser]
Hi I am having problem in sending email.. I have hosted my website on hostmonster.com and the following function is sending email to user.. but it doesn't get delivered.. and no error message is displayed...

Code:

function SendEmail($email)
    {
        $config['useragent'] = 'Test mail server';
        $config['mailtype'] = 'html';
        $config['validate'] = TRUE;

        $this->email->initialize($config);
        $this->email->from('[email protected]', 'web Registration');
        $this->email->to($email);

        $this->email->subject('Email confirmation required');

        $message = "Email body";

        $this->email->message($message);

        $this->email->send();

    }

Why it is so? Please help me as soon as possible?