<?php
      # Instantiate the client.
      $mg = new Mailgun('key-043780ddd6aec45f3f9361bf79d69491');
      $domain = 'ppd-mail.net';

      $batchMsg = $mg->BatchMessage($domain);
      $batchMsg->setReplyToAddress(''.$this->campaign->data['sender_name'].' <'.$this->campaign->data['sender_email'].'>');
      $batchMsg->setFromAddress(''.$this->campaign->data['sender_name'].' <'.$this->campaign->data['sender_email'].'>');
      $batchMsg->setSubject($this->campaign->data['subject']);
      $batchMsg->setHtmlBody(file_get_contents($this->campaign->data['payload']));
      $batchMsg->addCustomHeader('ppd_campaign_id', $this->campaign->id);
      $batchMsg->addCampaignId($this->campaign->id);

      foreach($this->campaign->contacts() as $contact):
        $batchMsg->addToRecipient($contact->email, ['ppd_recipient_id' => $contact->id, 'ppd_campaign_id' => $this->campaign->id, 'ppd_list_id' => $contact->list_id]);
      endforeach;

      // Finish our send
      $batchMsg->finalize();

      $this->campaign->status = 3;
      $this->campaign->delivered_at = Carbon::now();
      $this->campaign->save();