Describe the bug
When fetching a Message object from a icloud imap server, the message body part is empty, while the headers loads totally fine.
The Structure raw property is "" and parts is []

Used config
imap server : icloud
composer "webklex/php-imap": "dev-master#6d999438d29ed0bb920cd897b200a3a5fd6b6380" (to avoid composer requirements and other libraries check, #498 )

Code to Reproduce
The troubling code section which produces the reported bug.

 $cm = new ClientManager();
  $params = [
      'host'          => 'imap.mail.me.com',
      'port'          => 993,
      'encryption'    => 'ssl',
      'validate_cert' => true,
      'username'      => $username,
      'password'      => $password,
      'protocol'      => 'imap',
  ];
  
  $client = $cm->make($params);
  $client->connect();

  $folder = $client->getFolderByName('INBOX');

 if ($folder === null) {
            return false;
        }

        $messages = $folder
            ->messages()
            ->setFetchOrderAsc()
            ->all()
            ->since(new DateTimeImmutable('-10 years'))
            ->limit(10)
            ->get();

        for ($i = 0; $i < $messages->count(); ++$i) {
             $message = $messages[$i];
             print_r($message->getStructure());
        }

Expected behavior
$message->getStructure() should return a correct raw value with parsed parts array.

Desktop / Server (please complete the following information):

• OS: mac OS 14.5
• PHP: 8.3
• Version: dev-master#6d999438d29ed0bb920cd897b200a3a5fd6b6380
• Provider: icloud

Additional context
Only the body parts are empty, all the other features tested are working.
The package works fine when used with google (with OAuth2 of course)

As a temporary solution i use Ddeboer/imap for this icloud mailbox as it is not requiring OAuth token (yet)