Pop\Mail\Mail::send PHP Method

    public function send()
    {
        if (null === $this->message->getMessage()) {
            $this->message->init();
        }
        $messageBody = $this->message->getMessage();
        $headers = $this->buildHeaders() . $this->message->getEol() . $this->message->getEol();
        // Send as group message
        if ($this->group) {
            mail((string) $this->queue, $this->subject, $messageBody, $headers, $this->params);
            // Else, Iterate through the queue and send the mail messages.
        } else {
            foreach ($this->queue as $rcpt) {
                $subject = $this->subject;
                $message = $messageBody;
                // Set the recipient parameter.
                $to = isset($rcpt['name']) ? $rcpt['name'] . " <" . $rcpt['email'] . ">" : $rcpt['email'];
                // Replace any set placeholder content within the subject or message.
                foreach ($rcpt as $key => $value) {
                    $subject = str_replace('[{' . $key . '}]', $value, $subject);
                    $message = str_replace('[{' . $key . '}]', $value, $message);
                }
                // Send the email message.
                mail($to, $subject, $message, $headers, $this->params);
            }
        }
    }

 /**
  * Send user password reset notification
  *
  * @param  mixed  $user
  * @param  string $title
  * @return void
  */
 public function sendReset($user, $title)
 {
     $host = $_SERVER['HTTP_HOST'];
     $domain = str_replace('www.', '', $host);
     $newPassword = $this->random();
     $user->password = (new Bcrypt())->create($newPassword);
     $user->save();
     $rcpt = ['name' => $user->username, 'email' => $user->email, 'domain' => $domain, 'username' => $user->username, 'password' => $newPassword, 'title' => $title];
     $mailTemplate = __DIR__ . '/../../view/mail/forgot.txt';
     // Send email verification
     $mail = new Mail($title . ' (' . $domain . ') - Password Reset', $rcpt);
     $mail->from('noreply@' . $domain);
     $mail->setText(file_get_contents($mailTemplate));
     $mail->send();
 }