diff --git a/src/Adapters/PostalAdapter.php b/src/Adapters/PostalAdapter.php
index 23eded02..58904dc2 100644
--- a/src/Adapters/PostalAdapter.php
+++ b/src/Adapters/PostalAdapter.php
@@ -7,7 +7,7 @@
 use DomainException;
 use Illuminate\Support\Arr;
 use Postal\Client;
-use Postal\SendMessage;
+use Postal\Send\Message;
 use Sendportal\Base\Services\Messages\MessageTrackingOptions;
 
 class PostalAdapter extends BaseMailAdapter
@@ -20,12 +20,12 @@ public function send(string $fromEmail, string $fromName, string $toEmail, strin
     {
         $client = new Client('https://' . Arr::get($this->config, 'postal_host'), Arr::get($this->config, 'key'));
 
-        $message = new SendMessage($client);
+        $message = new Message($client);
         $message->to($toEmail);
         $message->from($fromName.' <'.$fromEmail.'>');
         $message->subject($subject);
         $message->htmlBody($content);
-        $response = $message->send();
+        $response = $client->send->message($message);
 
         return $this->resolveMessageId($response);
     }
@@ -35,7 +35,7 @@ public function send(string $fromEmail, string $fromName, string $toEmail, strin
     protected function resolveMessageId($response): string
     {
         foreach ($response->recipients() as $email => $message) {
-            return (string) $message->id();
+            return (string) $message->id;
         }
 
         throw new DomainException('Unable to resolve message ID');