protected static function attachment_mime($file)
	{
		static $mimes = false;

		if ( ! $mimes)
		{
			$mimes = \Config::load('mimes');
		}

		$ext = pathinfo($file, PATHINFO_EXTENSION);

		$mime = \Arr::get($mimes, $ext, 'application/octet-stream');
		is_array($mime) and $mime = reset($mime);

		return $mime;
	}