SMTP:从未知的 – >接收,但IP确实有一个有效的PTR / RDNS
我有以下问题。 我有一个smtp-relayserver服务器,收集从其他服务器发出的邮件,并检查他们(垃圾邮件刺客)。 现在标题显示这个: Received: from customerdomain.com (unknown [xxx.xxx.xxx.xxx]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by relayserver.com (Postfix) with ESMTPS id 1D576101747 for <[email protected]>; Fri, 29 Apr 2016 21:11:14 +0200 (CEST) Received: from XYZ (some-isp.com [xx.xx.xx.xx]) by outgoing-mailserver.com (Postfix) with ESMTPA id C684DAC4F2F for < [email protected] >; Fri, 29 Apr 2016 […]