Multiple Email Not Sending Correct

After you send the first email, you're either going to show_error() or redirect(), so the loop breaks. Instead, you should just track the results and store the debug messages for any failures, then show the errors or success message after the loop. For example:

PHP Code:

public function sendmail() {

    $config = array( 
        'protocol'  => 'smtp', 
        'smtp_host' => 'ssl://squid.arvixe.com', 
        'smtp_port' => 465, 
        'smtp_user' => '******', 
        'smtp_pass' => '******'
    ); 
    $this->load->library('email', $config);

    $mailResults = array();        
    $results = $this->get_emails();
    foreach ($results as $result) {
        $this->email->from(config_item('email'), config_item('website_name'));
        $this->email->to($result['email']);
        $this->email->subject('My mail through codeigniter from localhost'); 
        $this->email->message('Hello World…');
        if (! $this->email->send()) {
            $mailResults[] = $this->email->print_debugger();
        }
    }

    if (! empty($mailResults)) {
        show_error(implode('<br />', $mailResults));
    }

    $this->session->set_flashdata('success', 'Your e-mail has been sent!' . $result['email']);
    redirect('admin/mail');
} 


Thank you now under understand

There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!