Sender::__construct

public function __construct(Letter $letter)
{
	$this->letter          = $letter;
	$this->checkStatusStep = (int)Option::get('sender', 'send_check_status_step', $this->checkStatusStep);

	$this->message = $letter->getMessage();
	$this->message->getConfiguration()->set('LETTER_ID', $this->letter->getId());
}