Support custom to address on MailMessage

src/Illuminate/Notifications/Channels/MailChannel.php

@@ -42,7 +42,7 @@ public function send($notifiable, Notification $notification)
         $message = $notification->toMail($notifiable);
 
         $this->mailer->send($message->view, $message->data(), function ($m) use ($notifiable, $notification, $message) {
-            $recipients = $notifiable->routeNotificationFor('mail');
+            $recipients = empty($message->to) ? $notifiable->routeNotificationFor('mail') : $message->to;
 
             if (! empty($message->from)) {
                 $m->from($message->from[0], isset($message->from[1]) ? $message->from[1] : null);

src/Illuminate/Notifications/Messages/MailMessage.php

@@ -28,6 +28,13 @@ class MailMessage extends SimpleMessage
      */
     public $from = [];
 
+    /**
+     * The recipient information for the message.
+     *
+     * @var array
+     */
+    public $to = [];
+
     /**
      * The attachments for the message.
      *
@@ -71,6 +78,19 @@ public function from($address, $name = null)
         return $this;
     }
 
+    /**
+     * Set the recipient address for the mail message.
+     *
+     * @param  string|array  $address
+     * @return $this
+     */
+    public function to($address)
+    {
+        $this->to = $address;
+
+        return $this;
+    }
+
     /**
      * Attach a file to the message.
      *

tests/Notifications/NotificationMailChannelTest.php

@@ -181,6 +181,35 @@ public function testMessageWithFromAddressAndNoName()
 
         $channel->send($notifiable, $notification);
     }
+
+    public function testMessageWithToAddress()
+    {
+        $notification = new NotificationMailChannelTestNotificationWithToAddress;
+        $notifiable = new NotificationMailChannelTestNotifiable;
+
+        $message = $notification->toMail($notifiable);
+        $data = $message->toArray();
+
+        $channel = new Illuminate\Notifications\Channels\MailChannel(
+            $mailer = Mockery::mock(Illuminate\Contracts\Mail\Mailer::class)
+        );
+
+        $views = ['notifications::email', 'notifications::email-plain'];
+
+        $mailer->shouldReceive('send')->with($views, $data, Mockery::on(function ($closure) {
+            $mock = Mockery::mock('Illuminate\Mailer\Message');
+
+            $mock->shouldReceive('subject')->once();
+
+            $mock->shouldReceive('to')->once()->with('[email protected]');
+
+            $closure($mock);
+
+            return true;
+        }));
+
+        $channel->send($notifiable, $notification);
+    }
 }
 
 class NotificationMailChannelTestNotifiable
@@ -234,3 +263,12 @@ public function toMail($notifiable)
             ->from('[email protected]');
     }
 }
+
+class NotificationMailChannelTestNotificationWithToAddress extends Notification
+{
+    public function toMail($notifiable)
+    {
+        return (new MailMessage)
+            ->to('[email protected]');
+    }
+}