这次退回是发送到发送域的DNS记录中的邮件服务器还是发送回@R_404_318@的邮件服务器的IP地址?
Return-Path: <git-owner@vger.kernel.org> From: Sun He <sunheehnus@gmail.com> To: git@vger.kernel.org Subject: [PATCH v2] Replace memcpy with hashcpy when dealing hash copy globally