Support alwaysFrom handling in config, update job title to show From …

…address

src/jobs/SendJob.php

@@ -17,7 +17,10 @@ public function getJobType() {
 	}
 
 	public function getTitle() {
-		return 'Email via Mailgun To: ' . $this->parameters['to'] . ' Subject: ' . $this->parameters['subject'];
+		$to = isset($this->parameters['to']) ? $this->parameters['to'] : '';
+		$subject = isset($this->parameters['subject']) ? $this->parameters['subject'] : '';
+		$from = isset($this->parameters['from']) ? $this->parameters['from'] : '';
+		return "Email via Mailgun To: {$to} From: {$from} Subject: {$subject}";
 	}
 
 	public function getSignature() {

src/mailer/Mailer.php

@@ -18,6 +18,8 @@ class Mailer extends SilverstripeMailer {
 	protected $is_test_mode = false;// when true, Mailgun receives messages (accepted event) but does not send them to the remote. 'delivered' events are recorded.
 	protected $tags = [];//Note 4000 limit: http://mailgun-documentation.readthedocs.io/en/latest/user_manual.html#tagging
 	protected $sender = "";// for setting the sender header
+
+	public $alwaysFrom;// when set, override From address, applying From provided to Reply-To header
 
 	/**
 	 * {@inheritdoc}
@@ -72,6 +74,14 @@ protected function sendMessage($to, $from, $subject, $content, $plainContent, $a
 				$attachments = $this->prepareAttachments($attachments);
 
 				$parameters = [];
+
+				// check if alwaysFrom is set
+				if($this->alwaysFrom) {
+					$parameters['h:Reply-To'] = $from;// set the from as a replyto
+					$from = $this->alwaysFrom;
+					$this->setSender($from);//set Sender header to be the new From address
+				}
+
 				// add in o: and v: params
 				$this->addCustomParameters($parameters, $headers);