email - mail codeigniter was sent,but not found in inbox -

i testing send email using codeigniter , send email,but when checked inbox,i didn't find email send before.

here's controller:

 $this->load->library('email');   $this->email->from('email@yahoo.com', 'my name'); $this->email->to('email@yahoo.com');  $this->email->subject('email test');  $this->email->message('testing email class.');  $this->email->send();          echo $this->email->print_debugger(); 

success message:

your message has been sent using following protocol: mail     from: "xxxxxxxxxxxxxx"    return-path:    reply-to: "xxxxxxx@yahoo.com"   x-sender: xxxxxxx@yahoo.com x-mailer: codeigniter x-priority: 3 (normal) message-id: <xxxxxxx@yahoo.com> mime-version: 1.0 content-type: text/plain; charset=utf-8 content-transfer-encoding: 8bit =?utf-8?q?email_test?= testing email class. 

you may check spam folder in email account. gmail/yahoo set email spam when mail send local server.