diff --git a/README.md b/README.md
index df299b9..86f61fc 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ First you need to add a new entry to the mail drivers array in your `config/mail
         'address' => env('MAIL_FROM_ADDRESS'),
         'name' => env('MAIL_FROM_NAME'),
     ],
-    'save_to_sent_items' =>  env('MAIL_SAVE_TO_SENT_ITEMS'),
+    'save_to_sent_items' =>  env('MAIL_SAVE_TO_SENT_ITEMS', false),
 ],
 ```
 
diff --git a/config/msgraph-mail.php b/config/msgraph-mail.php
deleted file mode 100644
index e4571c5..0000000
--- a/config/msgraph-mail.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-
-// config for InnoGE/LaravelMsGraphMail
-return [
-    '',
-];
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 137d9f3..d2ecb11 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -4,3 +4,8 @@ parameters:
 			message: "#^Parameter \\#1 \\$message of static method Symfony\\\\Component\\\\Mime\\\\MessageConverter\\:\\:toEmail\\(\\) expects Symfony\\\\Component\\\\Mime\\\\Message, Symfony\\\\Component\\\\Mime\\\\RawMessage given\\.$#"
 			count: 1
 			path: src/MicrosoftGraphTransport.php
+
+		-
+			message: "#^Parameter \\#2 \\$html of method InnoGE\\\\LaravelMsGraphMail\\\\MicrosoftGraphTransport\\:\\:prepareAttachments\\(\\) expects string\\|null, resource\\|string\\|null given\\.$#"
+			count: 1
+			path: src/MicrosoftGraphTransport.php
diff --git a/src/LaravelMsGraphMailServiceProvider.php b/src/LaravelMsGraphMailServiceProvider.php
index 3a55210..64c1821 100644
--- a/src/LaravelMsGraphMailServiceProvider.php
+++ b/src/LaravelMsGraphMailServiceProvider.php
@@ -18,8 +18,7 @@ public function configurePackage(Package $package): void
          * More info: https://github.com/spatie/laravel-package-tools
          */
         $package
-            ->name('laravel-msgraph-mail')
-            ->hasConfigFile();
+            ->name('laravel-msgraph-mail');
     }
 
     public function boot(): void
diff --git a/tests/MicrosoftGraphTransportTest.php b/tests/MicrosoftGraphTransportTest.php
index a5af2dc..dc26213 100644
--- a/tests/MicrosoftGraphTransportTest.php
+++ b/tests/MicrosoftGraphTransportTest.php
@@ -20,6 +20,7 @@
             'address' => 'taylor@laravel.com',
             'name' => 'Taylor Otwell',
         ],
+        'save_to_sent_items' => null,
     ]);
     Config::set('mail.default', 'microsoft-graph');