diff --git a/src/Notification/Blueprint/BlueprintInterface.php b/src/Notification/Blueprint/BlueprintInterface.php
index 68b1d8553..422ba1784 100644
--- a/src/Notification/Blueprint/BlueprintInterface.php
+++ b/src/Notification/Blueprint/BlueprintInterface.php
@@ -9,6 +9,9 @@
 
 namespace Flarum\Notification\Blueprint;
 
+use Flarum\Database\AbstractModel;
+use Flarum\User\User;
+
 /**
  * A notification BlueprintInterface, when instantiated, represents a notification about
  * something. The blueprint is used by the NotificationSyncer to commit the
@@ -19,24 +22,35 @@ interface BlueprintInterface
     /**
      * Get the user that sent the notification.
      *
-     * @return \Flarum\User\User|null
+     * @deprecated Will be removed for beta.14
+     * @return User|null
      */
     public function getFromUser();
 
     /**
      * Get the model that is the subject of this activity.
      *
-     * @return \Flarum\Database\AbstractModel|null
+     * @deprecated Will be removed for beta.14
+     * @return AbstractModel|null
      */
     public function getSubject();
 
     /**
      * Get the data to be stored in the notification.
      *
+     * @deprecated Will be removed for beta.14
      * @return array|null
      */
     public function getData();
 
+    /**
+     * Get the attributes that uniquely identify a notification, plus metadata.
+     * TODO: Uncomment this for beta.14.
+     *
+     * @return array
+     */
+    //public function getAttributes(): array;
+
     /**
      * Get the serialized type of this activity.
      *
diff --git a/src/Notification/Blueprint/DiscussionRenamedBlueprint.php b/src/Notification/Blueprint/DiscussionRenamedBlueprint.php
index 181d298ad..7e569490a 100644
--- a/src/Notification/Blueprint/DiscussionRenamedBlueprint.php
+++ b/src/Notification/Blueprint/DiscussionRenamedBlueprint.php
@@ -51,6 +51,19 @@ class DiscussionRenamedBlueprint implements BlueprintInterface
         return ['postNumber' => (int) $this->post->number];
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getAttributes(): array
+    {
+        return [
+            'type' => static::getType(),
+            'from_user_id' => $this->post->user ? $this->post->user->id : null,
+            'subject_id' => $this->post->discussion ? $this->post->discussion->id : null,
+            'data' => json_encode(['postNumber' => (int) $this->post->number]),
+        ];
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/src/Notification/BlueprintBC.php b/src/Notification/BlueprintBC.php
new file mode 100644
index 000000000..b3a4209d0
--- /dev/null
+++ b/src/Notification/BlueprintBC.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Notification;
+
+use Flarum\Notification\Blueprint\BlueprintInterface;
+
+/**
+ * A backwards compatibility layer for notification blueprints.
+ *
+ * Will be removed for Beta 14 in favor of BlueprintInterface::getAttributes().
+ *
+ * @deprecated
+ */
+class BlueprintBC
+{
+    public static function getAttributes(BlueprintInterface $blueprint): array
+    {
+        if (method_exists($blueprint, 'getAttributes')) {
+            return $blueprint->getAttributes();
+        } else {
+            return [
+                'type' => $blueprint::getType(),
+                'from_user_id' => ($fromUser = $blueprint->getFromUser()) ? $fromUser->id : null,
+                'subject_id' => ($subject = $blueprint->getSubject()) ? $subject->id : null,
+                'data' => ($data = $blueprint->getData()) ? json_encode($data) : null
+            ];
+        }
+    }
+}
diff --git a/src/Notification/Event/Sending.php b/src/Notification/Event/Sending.php
index 4484cddc2..de2e1ca6e 100644
--- a/src/Notification/Event/Sending.php
+++ b/src/Notification/Event/Sending.php
@@ -23,7 +23,7 @@ class Sending
     /**
      * The users that the notification will be sent to.
      *
-     * @var array
+     * @var array|int[]
      */
     public $users;
 
diff --git a/src/Notification/Job/SendEmailNotificationJob.php b/src/Notification/Job/SendEmailNotificationJob.php
new file mode 100644
index 000000000..68bffeb17
--- /dev/null
+++ b/src/Notification/Job/SendEmailNotificationJob.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Notification\Job;
+
+use Flarum\Notification\MailableInterface;
+use Flarum\Notification\NotificationMailer;
+use Flarum\Queue\AbstractJob;
+use Flarum\User\User;
+
+class SendEmailNotificationJob extends AbstractJob
+{
+    /**
+     * @var MailableInterface
+     */
+    private $blueprint;
+
+    /**
+     * @var User
+     */
+    private $recipient;
+
+    public function __construct(MailableInterface $blueprint, User $recipient)
+    {
+        $this->blueprint = $blueprint;
+        $this->recipient = $recipient;
+    }
+
+    public function handle(NotificationMailer $mailer)
+    {
+        $mailer->send($this->blueprint, $this->recipient);
+    }
+}
diff --git a/src/Notification/Job/SendNotificationsJob.php b/src/Notification/Job/SendNotificationsJob.php
new file mode 100644
index 000000000..93a08b8fd
--- /dev/null
+++ b/src/Notification/Job/SendNotificationsJob.php
@@ -0,0 +1,55 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Notification\Job;
+
+use Carbon\Carbon;
+use Flarum\Notification\Blueprint\BlueprintInterface;
+use Flarum\Notification\BlueprintBC;
+use Flarum\Notification\Event\Sending;
+use Flarum\Notification\Notification;
+use Flarum\Queue\AbstractJob;
+use Flarum\User\User;
+
+class SendNotificationsJob extends AbstractJob
+{
+    /**
+     * @var BlueprintInterface
+     */
+    private $blueprint;
+
+    /**
+     * @var User[]
+     */
+    private $recipients;
+
+    public function __construct(BlueprintInterface $blueprint, array $recipients = [])
+    {
+        $this->blueprint = $blueprint;
+        $this->recipients = $recipients;
+    }
+
+    public function handle()
+    {
+        $now = Carbon::now('utc')->toDateTimeString();
+
+        event(new Sending($this->blueprint, $this->recipients));
+
+        $attributes = BlueprintBC::getAttributes($this->blueprint);
+
+        Notification::insert(
+            array_map(function (User $user) use ($attributes, $now) {
+                return $attributes + [
+                    'user_id' => $user->id,
+                    'created_at' => $now
+                ];
+            }, $this->recipients)
+        );
+    }
+}
diff --git a/src/Notification/NotificationSyncer.php b/src/Notification/NotificationSyncer.php
index 12a987fec..9ae014588 100644
--- a/src/Notification/NotificationSyncer.php
+++ b/src/Notification/NotificationSyncer.php
@@ -9,10 +9,11 @@
 
 namespace Flarum\Notification;
 
-use Carbon\Carbon;
 use Flarum\Notification\Blueprint\BlueprintInterface;
-use Flarum\Notification\Event\Sending;
+use Flarum\Notification\Job\SendEmailNotificationJob;
+use Flarum\Notification\Job\SendNotificationsJob;
 use Flarum\User\User;
+use Illuminate\Contracts\Queue\Queue;
 
 /**
  * The Notification Syncer commits notification blueprints to the database, and
@@ -37,25 +38,13 @@ class NotificationSyncer
     protected static $sentTo = [];
 
     /**
-     * @var NotificationRepository
+     * @var Queue
      */
-    protected $notifications;
+    protected $queue;
 
-    /**
-     * @var NotificationMailer
-     */
-    protected $mailer;
-
-    /**
-     * @param NotificationRepository $notifications
-     * @param NotificationMailer $mailer
-     */
-    public function __construct(
-        NotificationRepository $notifications,
-        NotificationMailer $mailer
-    ) {
-        $this->notifications = $notifications;
-        $this->mailer = $mailer;
+    public function __construct(Queue $queue)
+    {
+        $this->queue = $queue;
     }
 
     /**
@@ -69,7 +58,7 @@ class NotificationSyncer
      */
     public function sync(Blueprint\BlueprintInterface $blueprint, array $users)
     {
-        $attributes = $this->getAttributes($blueprint);
+        $attributes = BlueprintBC::getAttributes($blueprint);
 
         // Find all existing notification records in the database matching this
         // blueprint. We will begin by assuming that they all need to be
@@ -87,7 +76,7 @@ class NotificationSyncer
                 continue;
             }
 
-            $existing = $toDelete->first(function ($notification, $i) use ($user) {
+            $existing = $toDelete->first(function ($notification) use ($user) {
                 return $notification->user_id === $user->id;
             });
 
@@ -113,9 +102,14 @@ class NotificationSyncer
 
         // Create a notification record, and send an email, for all users
         // receiving this notification for the first time (we know because they
-        // didn't have a record in the database).
+        // didn't have a record in the database). As both operations can be
+        // intensive on resources (database and mail server), we queue them.
         if (count($newRecipients)) {
-            $this->sendNotifications($blueprint, $newRecipients);
+            $this->queue->push(new SendNotificationsJob($blueprint, $newRecipients));
+        }
+
+        if ($blueprint instanceof MailableInterface) {
+            $this->mailNotifications($blueprint, $newRecipients);
         }
     }
 
@@ -127,7 +121,7 @@ class NotificationSyncer
      */
     public function delete(BlueprintInterface $blueprint)
     {
-        Notification::where($this->getAttributes($blueprint))->update(['is_deleted' => true]);
+        Notification::where(BlueprintBC::getAttributes($blueprint))->update(['is_deleted' => true]);
     }
 
     /**
@@ -138,7 +132,7 @@ class NotificationSyncer
      */
     public function restore(BlueprintInterface $blueprint)
     {
-        Notification::where($this->getAttributes($blueprint))->update(['is_deleted' => false]);
+        Notification::where(BlueprintBC::getAttributes($blueprint))->update(['is_deleted' => false]);
     }
 
     /**
@@ -158,35 +152,6 @@ class NotificationSyncer
         static::$onePerUser = false;
     }
 
-    /**
-     * Create a notification record and send an email (depending on user
-     * preference) from a blueprint to a list of recipients.
-     *
-     * @param \Flarum\Notification\Blueprint\BlueprintInterface $blueprint
-     * @param User[] $recipients
-     */
-    protected function sendNotifications(Blueprint\BlueprintInterface $blueprint, array $recipients)
-    {
-        $now = Carbon::now('utc')->toDateTimeString();
-
-        event(new Sending($blueprint, $recipients));
-
-        $attributes = $this->getAttributes($blueprint);
-
-        Notification::insert(
-            array_map(function (User $user) use ($attributes, $now) {
-                return $attributes + [
-                    'user_id' => $user->id,
-                    'created_at' => $now
-                ];
-            }, $recipients)
-        );
-
-        if ($blueprint instanceof MailableInterface) {
-            $this->mailNotifications($blueprint, $recipients);
-        }
-    }
-
     /**
      * Mail a notification to a list of users.
      *
@@ -197,7 +162,7 @@ class NotificationSyncer
     {
         foreach ($recipients as $user) {
             if ($user->shouldEmail($blueprint::getType())) {
-                $this->mailer->send($blueprint, $user);
+                $this->queue->push(new SendEmailNotificationJob($blueprint, $user));
             }
         }
     }
@@ -212,21 +177,4 @@ class NotificationSyncer
     {
         Notification::whereIn('id', $ids)->update(['is_deleted' => $isDeleted]);
     }
-
-    /**
-     * Construct an array of attributes to be stored in a notification record in
-     * the database, given a notification blueprint.
-     *
-     * @param \Flarum\Notification\Blueprint\BlueprintInterface $blueprint
-     * @return array
-     */
-    protected function getAttributes(Blueprint\BlueprintInterface $blueprint)
-    {
-        return [
-            'type' => $blueprint::getType(),
-            'from_user_id' => ($fromUser = $blueprint->getFromUser()) ? $fromUser->id : null,
-            'subject_id' => ($subject = $blueprint->getSubject()) ? $subject->id : null,
-            'data' => ($data = $blueprint->getData()) ? json_encode($data) : null
-        ];
-    }
 }
diff --git a/src/Queue/AbstractJob.php b/src/Queue/AbstractJob.php
new file mode 100644
index 000000000..6ec8235a8
--- /dev/null
+++ b/src/Queue/AbstractJob.php
@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Queue;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+
+class AbstractJob implements ShouldQueue
+{
+    use InteractsWithQueue;
+    use Queueable;
+    use SerializesModels;
+}