diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
new file mode 100644
index 0000000..a1fa225
--- /dev/null
+++ b/.github/workflows/run-tests.yml
@@ -0,0 +1,57 @@
+name: run-tests
+
+on: [push, pull_request]
+
+jobs:
+    test:
+        runs-on: ${{ matrix.os }}
+        strategy:
+            fail-fast: false
+            matrix:
+                os: [ubuntu-latest]
+                php: [7.3, 8.0, 8.1]
+                laravel: [9.*, 8.*, 7.*, 6.*]
+                stability: [prefer-stable]
+                exclude:
+                    -   php: 7.3
+                        laravel: 9.*
+                    -   php: 8.1
+                        laravel: 7.*
+                    -   php: 8.1
+                        laravel: 6.*
+                include:
+                    -   laravel: 9.*
+                        testbench: 7.*
+                    -   laravel: 8.*
+                        testbench: 6.23
+                    -   laravel: 7.*
+                        testbench: 5.20.0
+                    -   laravel: 6.*
+                        testbench: 4.18.0
+
+        name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}
+
+        steps:
+            -   name: Checkout code
+                uses: actions/checkout@v2
+
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php }}
+                    extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv, imagick
+                    coverage: none
+
+#            - name: Setup problem matchers
+#              run: |
+#                  echo "::add-matcher::${{ runner.tool_cache }}/php.json"
+#                  echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
+#
+            -   name: Install dependencies
+                run: |
+                    composer install
+                    composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+                    composer update --${{ matrix.stability }} --prefer-dist --no-interaction
+
+            -   name: Execute tests
+                run: vendor/bin/phpunit
diff --git a/src/Drivers/Log.php b/src/Drivers/Log.php
index 6459db9..e27044a 100644
--- a/src/Drivers/Log.php
+++ b/src/Drivers/Log.php
@@ -19,9 +19,11 @@ public function processLog(MessageSent $event)
             return;
         }
 
+        $message = version_compare(app()->version(), '9.0.0', '>') ? $event->sent->toString() : $event->message;
+
         /** @var InboundEmail $modelClass */
         $modelClass = config('mailbox.model');
-        $email = $modelClass::fromMessage($event->message);
+        $email = $modelClass::fromMessage($message);
 
         Mailbox::callMailboxes($email);
     }
diff --git a/src/InboundEmail.php b/src/InboundEmail.php
index 9e7949f..089bb02 100644
--- a/src/InboundEmail.php
+++ b/src/InboundEmail.php
@@ -149,12 +149,20 @@ public function message(): MimeMessage
     public function reply(Mailable $mailable)
     {
         if ($mailable instanceof \Illuminate\Mail\Mailable) {
-            $mailable->withSwiftMessage(function (\Swift_Message $message) {
-                $message->getHeaders()->addIdHeader('In-Reply-To', $this->id());
-            });
+            $usesSymfonyMailer = version_compare(app()->version(), '9.0.0', '>');
+
+            if ($usesSymfonyMailer) {
+                $mailable->withSymfonyMessage(function (\Symfony\Component\Mime\Email $email) {
+                    $email->getHeaders()->addIdHeader('In-Reply-To', $this->id());
+                });
+            } else {
+                $mailable->withSwiftMessage(function (\Swift_Message $message) {
+                    $message->getHeaders()->addIdHeader('In-Reply-To', $this->id());
+                });
+            }
         }
 
-        return Mail::to($this->from())->send($mailable);
+        return Mail::to($this->headerValue('Reply-To') ?: $this->from())->send($mailable);
     }
 
     public function forward($recipients)