最近我得到了很多反弹。
我以为我的Google Apps帐户已被盗用，但是我的Apps帐户上没有任何活动，因此我肯定没有恶意用户。
由于电子邮件始终是从某个随机用户名发送的（例如onSecNtV1@mydomain.com），因此，我试图找到一种禁止从未注册用户发送电子邮件的方法。我什么都找不到。
让我担心的是，该邮件具有X-Google-DKIM-Signature，并显示“ Google尝试传递您的邮件”。这是否意味着电子邮件来自我可信赖的客户？（我只使用gmail）
AFAIK垃圾邮件发送者可以随意欺骗电子邮件的每个字段，但是DKIM应该使（现代）服务器丢弃这些无法验证的电子邮件。
知道泄漏在哪里吗？
这是一个反弹示例：
Delivery to the following recipient failed permanently:
spoonbillzi7@etisbew.com
Technical details of permanent failure: Google tried to deliver your
message, but it was rejected by the server for the recipient domain
174.133.125.2 [174.133.125.2].
The error that the other server returned was: 553 sorry, that domain
isn't in my list of allowed rcpthosts; no valid cert for gatewaying
(#5.7.1)
----- Original message -----
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=google.com; s=20120113;
h=x-received:x-received:received-spf:mime-version:date:message-id
:from:to:subject:content-type:content-transfer-encoding
:list-unsubscribe:x-gm-message-state;
bh=l2RiLiEDvrHgBMSAjtLmNgIpmW4D1EFAIr3O42oBysM=;
b=UBSW90YcP4Fu1vDLnvGCp06XEE5+FOAUR62qSnQrnaPcsKWJSdFT7x7XSU2+vHrpTI
RaN4pHJWlaMHqtAUoMFE0T9hgBj0blZnNMDtMRFkcU4QD0E/QNw6VIQlAjWGOWvXghMc
G+SX+YLugnQEWS6tG6guf1hF31XoB4a2HxvxQO4J+lWNLg60LaS7K4DiUr4yG25mvXBU
uy+tXqjLKyZgA9jmvyVvBKeRYVwMIWvscJ26yw17K7LRfGZkAXzuvTVyGMuLUzthj5c5
MSNZOG6u5faxtzdBkGRiNQVarq3IsXBuXcxk1vRiUktbM8OIhm2D4IrvhmTPrDF4yyTz
EHhw==
X-Received: by 10.50.37.239 with SMTP id b15mr4892361igk.69.1360854627245; Thu, 14 Feb 2013 07:10:27 -0800 (PST)
X-Received: by 10.50.37.239 with SMTP id b15mr4892357igk.69.1360854627177; Thu, 14 Feb 2013 07:10:27 -0800 (PST)
Return-Path: <onSecNtV1@mydomain.com>
Received: from [117.201.44.87] ([117.201.34.157]) by mx.google.com with ESMTP id vx6si33676538igb.26.2013.02.14.07.10.25; Thu, 14 Feb 2013 07:10:26 -0800 (PST)
Received-SPF: neutral (google.com: 117.201.34.157 is neither permitted nor denied by best guess record for domain of onSecNtV1@mydomain.com) client-ip=117.201.34.157;
Authentication-Results: mx.google.com; spf=neutral (google.com: 117.201.34.157 is neither permitted nor denied by best guess record for domain of onSecNtV1@mydomain.com) smtp.mail=onSecNtV1@mydomain.com
MIME-Version: 1.0
Date: Thu, 14 Feb 2013 20:40:29 +0530
Message-ID: <B23FC935D84FBB6D39DD9BDCC44CD2.176.3699432888759@D>
From: "Valetine's Day" <onSecNtV1@mydomain.com>
To: spoonbillzi7@etisbew.com
Subject: I will be excited if you are my Valetine
Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: 8bit
List-Unsubscribe: <mailto:E7E740C2663A5B2B9D18@missinyou.com>
X-Gm-Message-State: ALoCoQkVcAw4pG/8g2x1C02KHf4lLkBdJ4iLe9r1ZeGlGE1AwtZEQm5VsHh9tNmG04yH2ahWqXnIiKu7DrTf7j6bLHEaF0l0AMhrC6ZvnyJTUr4n+9TKMieQPycP0Pw8sCJ8DELiMNlLI/CGbgQ1ObMLghXauZTeqg==
----- End of message -----