$this->load->library('email');
$this->email->set_newline("\r\n");
$this->email->from('xxxx@gmail.com','xxxx');
$this->email->to('xxxx@gmail.com');
$this->email->subject('Password reset');
$this->email->message('You have requested the new password');
if($this->email->send())
{
echo 'Your email was sent, successfully.';
}
else
{
show_error($this->email->print_debugger());
}

var $useragent = "CodeIgniter";
var $mailpath = "/usr/sbin/sendmail";
var $protocol = "smtp";
var $smtp_host = "smtp.gmail.com";
var $smtp_user = "xxxxx@gmail.com";
var $smtp_pass = "***********";
var $smtp_port = "587";
var $smtp_timeout = 9;
var $smtp_crypto = "tls";
var $wordwrap = TRUE;
var $wrapchars = "76";
var $mailtype = "text";
var $charset = "utf-8";
var $multipart = "mixed";
var $alt_message = "'';
var $validate = FALSE;
var $priority = "1";
var $newline = "\r\n";
var $crlf = "\r\n";

$autoload['libraries'] = array('session','database','email');

php.ini
di xampp/php/php.ini ;extension=php_openssl.dll diuncomment menjadi extension=php_openssl.dll,
setelah melakukan uncomment di extension=php_openssl.dll jangan lupa restart xampp bahkan restart pc klo perlu