Codeigniter not sending email!

[eluser]behnampmdg3[/eluser]
[quote author="Tpojka" date="1383819449"]What is happening when exit(); is removed - some php error? ?[/quote]Nothing. I have a redirect after that, it redirects me

Code:

redirect('https://www.'.SITE.'/send_redeem/sent/'.$voucher_id, 'refresh');