Fix wrong sender address handling, body generation and wrong return types

Author: TKrisee

src/Mailers/O365/Office365Connector.php

@@ -75,15 +75,15 @@ public function sendMessageRequest(Email $message): Message
 
         return $this->client->createRequest("POST", "/users/" . (current($message->getFrom())->getAddress()) . "/sendmail")
             ->attachBody($this->getBody($message))
-            ->setReturnType(\Microsoft\Graph\Model\Message::class)
+            ->setReturnType(Message::class)
             ->execute();
     }
 
     protected function createDraftMessage(Email $message): Message
     {
         return $this->client->createRequest("POST", "/users/" . (current($message->getFrom())) . "/messages")
             ->attachBody($this->getBody($message, true))
-            ->setReturnType(\Microsoft\Graph\Model\Message::class)
+            ->setReturnType(Message::class)
             ->execute();
     }