CodeIgniter unable to send email using PHP mail()

Had similar issue.

That's working code from the controller :

        $config = array();        $config['useragent']           = "CodeIgniter";        $config['mailpath']            = "/usr/bin/sendmail"; // or "/usr/sbin/sendmail"        $config['protocol']            = "smtp";        $config['smtp_host']           = "localhost";        $config['smtp_port']           = "25";        $config['mailtype'] = 'html';        $config['charset']  = 'utf-8';        $config['newline']  = "\r\n";        $config['wordwrap'] = TRUE;        $this->load->library('email');        $this->email->initialize($config);        $this->email->from($fromEmail, $fromName);        $this->email->to($email);        $this->email->subject('Тест Email');        $this->email->message($this->load->view('email/'.$type.'-html', $data, TRUE));        $this->email->send();

Clearly, there does not seem to be a definitive 'one size fits all' answer. What worked for me was changing

$config['protocol'] = 'smtp';

TO:

$config['protocol'] = 'mail';

Hope this helps...

Do you have an email.php file in your config folder? Maybe there's a problem with your configuration in there.