Merge pull request #21 from geekdevs/feature/headers

Added support for custom headers

Author: moux2003

src/Services/SendGridTransport.php

@@ -68,6 +68,15 @@ class SendGridTransport implements Swift_Transport
  */
  private $eventDispatcher;
 
+ /**
+ * Some header keys are reserved. You may not include any of the following reserved keys
+ * (From SendGrid docs)
+ */
+ const RESERVED_KEYWORDS = [
+ 'x-sg-id', 'x-sg-eid', 'received', 'dkim-signature', 'Content-Type', 'Content-Transfer-Encoding',
+ 'To', 'From', 'Subject', 'Reply-To', 'CC', 'BCC'
+ ];
+
  public function __construct(Swift_Events_EventDispatcher $eventDispatcher, $sendGridApiKey, $sendGridCategories)
  {
  $this->eventDispatcher = $eventDispatcher;
@@ -220,6 +229,16 @@ public function send(Swift_Mime_SimpleMessage $message, &$failedRecipients = nul
  }
  }
 
+ // add headers
+ if ($headers = $message->getHeaders()->getAll()) {
+ foreach ($headers as $header) {
+ $headerName = $header->getFieldName();
+ if (!in_array($headerName, self::RESERVED_KEYWORDS)) {
+ $mail->addHeader($headerName, $header->getFieldBody());
+ }
+ }
+ }
+
  $sendGrid = new SendGrid($this->sendGridApiKey, $this->httpClientOptions);
 
  $response = $sendGrid->client->mail()->send()->post($mail);