SendGrid SMTP Configuration in Codeigniter

//SendGrid Email configuration

$config['protocol'] = 'smtp';
$config['charset'] = 'utf-8';
$config['smtp_host'] = 'smtp.sendgrid.net';
$config['smtp_user'] = 'SENDGRID LOGIN USERNAME';
$config['smtp_pass'] = 'SENDGRID LOGIN PASSWORD';
$config['smtp_port'] = 587;

$config['crlf'] = "\r\n";
$config['newline'] = "\r\n";
$config['wordwrap'] = TRUE;

$config['mailtype'] = 'html';

$this->email->initialize($config);
$this->load->library('email');