我很疯狂地弄明白为什么我的电子邮件被Gmail标记为垃圾邮件。
SPF和DKIM都通过了。知道会发生什么事吗？以下是Gmail的示例标题（为隐私而更改的IP和域名）：
Delivered-To: XXXXXXXXXXXXXXX@gmail.com
Received: by 10.50.15.201 with SMTP id z9csp2075257igc;
Wed, 21 Jan 2015 12:34:45 -0800 (PST)
X-Received: by 10.180.89.225 with SMTP id br1mr37591618wib.70.1421872484313;
Wed, 21 Jan 2015 12:34:44 -0800 (PST)
Return-Path: <yyyyyy@example.com>
Received: from MY.MAILSERVER.com (MY.MAILSERVER.com. [217.172.XXX.XXX])
by mx.google.com with ESMTPS id k10si315060wiz.77.2015.01.21.12.34.43
for <XXXXXXXXXXXXXXX@gmail.com>
(version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128);
Wed, 21 Jan 2015 12:34:44 -0800 (PST)
Received-SPF: pass (google.com: domain of yyyyyy@example.com designates 217.172.XXX.XXX as permitted sender) client-ip=217.172.XXX.XXX;
Authentication-Results: mx.google.com;
spf=pass (google.com: domain of yyyyyy@example.com designates 217.172.XXX.XXX as permitted sender) smtp.mail=yyyyyy@example.com;
dkim=pass header.i=@example.com
Received: from PietPC (ip-84-119-117-236.unity-media.net [84.119.117.236])
(using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits))
(No client certificate requested)
(Authenticated sender: yyyyyy@example.com)
by MY.MAILSERVER.com (Postfix) with ESMTPSA id 1A56F7659B3
for <XXXXXXXXXXXXXXX@gmail.com>; Wed, 21 Jan 2015 21:34:31 +0100 (CET)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=example.com; s=mail;
t=1421872486; bh=PwUG0SLiX8we/Zb4/tKUkTAw+2s5Aab+YjM1uaM2FOY=;
h=From:To:Subject:Date;
b=FbGkEinlkILGtwi5DI9zJXN2wTIUhGMvhI34pwWiyXIZMBUkNX+4EahcTkNwSIWdS
epSqWBjjQ33j5D33jVylRBSka4eyNH7aCZJLH91iWLD5G09OEGeCCgeq7Rf7pQ5PC5
ry/6Eq72t7jqxEoxINVnY8odfQx8BPQ19qNTuHIA=
From: <yyyyyy@example.com>
To: <XXXXXXXXXXXXXXX@gmail.com>
Subject: Mittag Essen
Date: Wed, 21 Jan 2015 21:34:20 +0100
Message-ID: <012b01d035b9$ab92f060$02b8d120$@example.com>
MIME-Version: 1.0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
X-Mailer: Microsoft Outlook 14.0
Thread-Index: AdA1uaJS4CMjPIuyTaimdKHtOrYSoQ==
Content-Language: de
Besteht unser Termin fuers Mittag essen?