	public static function NewInstance($oImapResponse)
	{
		return new self($oImapResponse);
	}

	/**
	 * @param bool $bForce = false
	 *
	 * @return array|null
	 */
	public function GetEnvelope($bForce = false)
	{
		if (null === $this->aEnvelopeCache || $bForce)
		{
