diff --git a/src/Illuminate/Mail/Mailable.php b/src/Illuminate/Mail/Mailable.php
index 79c9cfa89538..2cfdab44ef23 100644
--- a/src/Illuminate/Mail/Mailable.php
+++ b/src/Illuminate/Mail/Mailable.php
@@ -136,6 +136,20 @@ class Mailable implements MailableContract, Renderable
      */
     public $diskAttachments = [];
 
+    /**
+     * The tags for the message.
+     *
+     * @var array
+     */
+    protected $tags = [];
+
+    /**
+     * The metadata for the message.
+     *
+     * @var array
+     */
+    protected $metadata = [];
+
     /**
      * The callbacks for the message.
      *
@@ -190,6 +204,8 @@ public function send($mailer)
                 $this->buildFrom($message)
                      ->buildRecipients($message)
                      ->buildSubject($message)
+                     ->buildTags($message)
+                     ->buildMetadata($message)
                      ->runCallbacks($message)
                      ->buildAttachments($message);
             });
@@ -449,6 +465,40 @@ protected function buildDiskAttachments($message)
         }
     }
 
+    /**
+     * Add all defined tags to the message.
+     *
+     * @param  \Illuminate\Mail\Message  $message
+     * @return $this
+     */
+    protected function buildTags($message)
+    {
+        if ($this->tags) {
+            foreach ($this->tags as $tag) {
+                $message->getHeaders()->add(new TagHeader($tag));
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Add all defined metadata to the message.
+     *
+     * @param  \Illuminate\Mail\Message  $message
+     * @return $this
+     */
+    protected function buildMetadata($message)
+    {
+        if ($this->metadata) {
+            foreach ($this->metadata as $key => $value) {
+                $message->getHeaders()->add(new MetadataHeader($key, $value));
+            }
+        }
+
+        return $this;
+    }
+
     /**
      * Run the callbacks for the message.
      *
@@ -884,9 +934,9 @@ public function attachData($data, $name, array $options = [])
      */
     public function tag($value)
     {
-        return $this->withSymfonyMessage(function (Email $message) use ($value) {
-            $message->getHeaders()->add(new TagHeader($value));
-        });
+        array_push($this->tags, $value);
+
+        return $this;
     }
 
     /**
@@ -898,9 +948,9 @@ public function tag($value)
      */
     public function metadata($key, $value)
     {
-        return $this->withSymfonyMessage(function (Email $message) use ($key, $value) {
-            $message->getHeaders()->add(new MetadataHeader($key, $value));
-        });
+        $this->metadata[$key] = $value;
+
+        return $this;
     }
 
     /**
diff --git a/src/Illuminate/Notifications/Channels/MailChannel.php b/src/Illuminate/Notifications/Channels/MailChannel.php
index 77885b87a88e..594320d5b791 100644
--- a/src/Illuminate/Notifications/Channels/MailChannel.php
+++ b/src/Illuminate/Notifications/Channels/MailChannel.php
@@ -9,6 +9,8 @@
 use Illuminate\Notifications\Notification;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
+use Symfony\Component\Mailer\Header\MetadataHeader;
+use Symfony\Component\Mailer\Header\TagHeader;
 
 class MailChannel
 {
@@ -144,6 +146,18 @@ protected function buildMessage($mailMessage, $notifiable, $notification, $messa
             $mailMessage->setPriority($message->priority);
         }
 
+        if ($message->tags) {
+            foreach ($message->tags as $tag) {
+                $mailMessage->getHeaders()->add(new TagHeader($tag));
+            }
+        }
+
+        if ($message->metadata) {
+            foreach ($message->metadata as $key => $value) {
+                $mailMessage->getHeaders()->add(new MetadataHeader($key, $value));
+            }
+        }
+
         $this->runCallbacks($mailMessage, $message);
     }
 
diff --git a/src/Illuminate/Notifications/Messages/MailMessage.php b/src/Illuminate/Notifications/Messages/MailMessage.php
index da4a6a678627..be77c5dbc059 100644
--- a/src/Illuminate/Notifications/Messages/MailMessage.php
+++ b/src/Illuminate/Notifications/Messages/MailMessage.php
@@ -7,9 +7,6 @@
 use Illuminate\Contracts\Support\Renderable;
 use Illuminate\Mail\Markdown;
 use Illuminate\Support\Traits\Conditionable;
-use Symfony\Component\Mailer\Header\MetadataHeader;
-use Symfony\Component\Mailer\Header\TagHeader;
-use Symfony\Component\Mime\Email;
 
 class MailMessage extends SimpleMessage implements Renderable
 {
@@ -85,6 +82,20 @@ class MailMessage extends SimpleMessage implements Renderable
      */
     public $rawAttachments = [];
 
+    /**
+     * The tags for the message.
+     *
+     * @var array
+     */
+    public $tags = [];
+
+    /**
+     * The metadata for the message.
+     *
+     * @var array
+     */
+    public $metadata = [];
+
     /**
      * Priority level of the message.
      *
@@ -264,9 +275,9 @@ public function attachData($data, $name, array $options = [])
      */
     public function tag($value)
     {
-        return $this->withSymfonyMessage(function (Email $message) use ($value) {
-            $message->getHeaders()->add(new TagHeader($value));
-        });
+        array_push($this->tags, $value);
+
+        return $this;
     }
 
     /**
@@ -278,9 +289,9 @@ public function tag($value)
      */
     public function metadata($key, $value)
     {
-        return $this->withSymfonyMessage(function (Email $message) use ($key, $value) {
-            $message->getHeaders()->add(new MetadataHeader($key, $value));
-        });
+        $this->metadata[$key] = $value;
+
+        return $this;
     }
 
     /**
diff --git a/tests/Mail/MailMailableTest.php b/tests/Mail/MailMailableTest.php
index 746e2c0893a3..9ed3e1d83553 100644
--- a/tests/Mail/MailMailableTest.php
+++ b/tests/Mail/MailMailableTest.php
@@ -445,6 +445,48 @@ public function testMailablePriorityGetsSent()
         $this->assertSame('hello@laravel.com', $sentMessage->getEnvelope()->getRecipients()[0]->getAddress());
         $this->assertStringContainsString('X-Priority: 1 (Highest)', $sentMessage->toString());
     }
+
+    public function testMailableMetadataGetsSent()
+    {
+        $view = m::mock(Factory::class);
+
+        $mailer = new Mailer('array', $view, new ArrayTransport);
+
+        $mailable = new WelcomeMailableStub;
+        $mailable->to('hello@laravel.com');
+        $mailable->from('taylor@laravel.com');
+        $mailable->html('test content');
+
+        $mailable->metadata('origin', 'test-suite');
+        $mailable->metadata('user_id', 1);
+
+        $sentMessage = $mailer->send($mailable);
+
+        $this->assertSame('hello@laravel.com', $sentMessage->getEnvelope()->getRecipients()[0]->getAddress());
+        $this->assertStringContainsString('X-Metadata-origin: test-suite', $sentMessage->toString());
+        $this->assertStringContainsString('X-Metadata-user_id: 1', $sentMessage->toString());
+    }
+
+    public function testMailableTagGetsSent()
+    {
+        $view = m::mock(Factory::class);
+
+        $mailer = new Mailer('array', $view, new ArrayTransport);
+
+        $mailable = new WelcomeMailableStub;
+        $mailable->to('hello@laravel.com');
+        $mailable->from('taylor@laravel.com');
+        $mailable->html('test content');
+
+        $mailable->tag('test');
+        $mailable->tag('foo');
+
+        $sentMessage = $mailer->send($mailable);
+
+        $this->assertSame('hello@laravel.com', $sentMessage->getEnvelope()->getRecipients()[0]->getAddress());
+        $this->assertStringContainsString('X-Tag: test', $sentMessage->toString());
+        $this->assertStringContainsString('X-Tag: foo', $sentMessage->toString());
+    }
 }
 
 class WelcomeMailableStub extends Mailable
diff --git a/tests/Notifications/NotificationMailMessageTest.php b/tests/Notifications/NotificationMailMessageTest.php
index 94db5b6d284c..74631eb9f8b7 100644
--- a/tests/Notifications/NotificationMailMessageTest.php
+++ b/tests/Notifications/NotificationMailMessageTest.php
@@ -121,6 +121,26 @@ public function testReplyToIsSetCorrectly()
         $this->assertSame([['test@example.com', null], ['test@example.com', 'Test']], $message->replyTo);
     }
 
+    public function testMetadataIsSetCorrectly()
+    {
+        $message = new MailMessage;
+        $message->metadata('origin', 'test-suite');
+        $message->metadata('user_id', 1);
+
+        $this->assertArrayHasKey('origin', $message->metadata);
+        $this->assertSame('test-suite', $message->metadata['origin']);
+        $this->assertArrayHasKey('user_id', $message->metadata);
+        $this->assertSame(1, $message->metadata['user_id']);
+    }
+
+    public function testTagIsSetCorrectly()
+    {
+        $message = new MailMessage;
+        $message->tag('test');
+
+        $this->assertContains('test', $message->tags);
+    }
+
     public function testCallbackIsSetCorrectly()
     {
         $callback = function () {