Specify proper .eml mime type when saving the file into storage. (#5)

Author: clemblanco

src/Listeners/ExportMessage.php

@@ -67,7 +67,9 @@ private function storeMessage()
 
         $this->filesystem
             ->disk($storageOptions->disk)
-            ->put($storageOptions->fullpath(), $this->message->toString());
+            ->put($storageOptions->fullpath(), $this->message->toString(), [
+                'mimetype' => $storageOptions::MIME_TYPE,
+            ]);
 
         event(new MessageStored($this->message, $storageOptions));
     }

src/StorageOptions.php

@@ -14,6 +14,7 @@
 class StorageOptions
 {
     const EXTENSION = 'eml';
+    const MIME_TYPE = 'message/rfc822';
 
     /**
      * @var string