通过 Gmail 的电子邮件延迟

Question

我公司的一些人有时在接收电子邮件时会遇到严重的延迟。根据标题，我们最近收到一封延迟了 41 小时的电子邮件。

我的问题是：如何从标题中判断延迟发生的位置？

以下是标题信息：

Delivered-To: [e-mail]
Received: by [IPv6 address] with SMTP id xxxx;
Thu, 21 Jun 2018 12:09:37 -0700 (PDT)
X-Google-Smtp-Source: ADUXVKLqsR+/5f7yZylgc2gqka7aUXfxkHDqRSakERiAIWb1Z2F8mVXArCn5m9btBNOX2V33XedQNO3bGGc=
X-Received: by 2002:a17:902:26:: with SMTP id xxxx;
Thu, 21 Jun 2018 12:09:30 -0700 (PDT)
Authentication-Results: mx.google.com;
spf=neutral (google.com: [IPv4 address] is neither permitted nor denied by best guess record for domain of postmaster@unknown) smtp.mailfrom=unknown;
dkim=pass header.i=@gmail.com header.s=20161025 header.b=Vbyb+AsW
Received-SPF: neutral (google.com: [IPv4 address] is neither permitted nor denied by best guess record for domain of postmaster@unknown) client-ip=xxxx;
Received: by [IPv6] with POP3 id xxxx;
***Thu, 21 Jun 2018 12:09:30 -0700 (PDT)***
X-Gmail-Fetch-Info: [e-mail] 1 pop.secureserver.net 110 [e-mail]
Received: (qmail xxxx invoked by uid xxxx); 20 Jun 2018 02:04:40 -0000
Received: from unknown (HELO p3plibsmtp02-04.prod.phx3.secureserver.net) ([xxx.xxx.xxx.xxx])
(envelope-sender <[e-mail]>)
by p3plsmtp16-04-26.prod.phx3.secureserver.net (qmail-1.03) with SMTP
for <[e-mail]>; 20 Jun 2018 02:04:40 -0000
Received: from mail-io0-f181.google.com ([xxx.xxx.xxx.xxx]) by bizsmtp with ESMTP id xxxxxxxxxxxxx; Tue, 19 Jun 2018 19:04:40 -0700
Received: by mail-io0-f181.google.com with SMTP id xxxxxxxxxxx
for <[e-mail]>; Tue, 19 Jun 2018 19:04:40 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20161025;
h=mime-version:references:in-reply-to:from:date:message-id:subject:to;
bh=CNMwscN/OeorZ5H/ZMHM0N9eSy/5w54myskOI89X1UA=;
b=Vbyb+AsWWkvt4ALxO1tfg4chHf1zODZAFx0u7+7OlSt+R+fw7R+2RwCa8G641MdW7L
CpNJcpkV/defZFONRd7SpYGpEFrYXB/WSAilCp4Dz+ZGxmUdik4zMeWX6FJvZBSLkzW3
RQ6XVb/7+8ABei0bycGvze9VIJmvfr7Fqe72w4mRB376WBQXDX/VRDDxeBOMI1yi11Ia
pcneUMziNWEv6lGxQ71hsgys1rJBHugCT4n9Ab1I7xlYP+qQKLdrIdWVkPyUuNsWVXy1
HTfmg7Pi5rjNXNP2Z/sOxRvL4OzkFKfJzY5qULL+uNjB+z9aNwoA51ml2CzYaoHbvx/1
Pohw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20161025;
h=x-gm-message-state:mime-version:references:in-reply-to:from:date
:message-id:subject:to;
bh=CNMwscN/OeorZ5H/ZMHM0N9eSy/5w54myskOI89X1UA=;
b=WgeItjuJ/SczklmIAVuO4fP3HkOpq+7I9HL7AX4qqPZWYbcLKxZ7EqC0L+yro+Nf24
A2kRN6Ss0/PKDNI+m8KRksUM7ouKJBuMS0j3vdC6W6XSDh2giyFZWgPGIJ+oasG9o4hT
yjJ3effdm/+t8aEUUnhwcGZb84Dxno2SQuX3NIy/FZSr8g4Wj74W8pzS9JxFwZrSIts/
tqTXoq9r16wQ1Uc3asWCE+OxgOSSqMU4OjqsTrCbAJxe3VmHNKLx0i3SvIKGsJ35mY5y
aRhSnTh6bD/CQsv4rG4DRVmaZPlvQ3E/qRSGGNOx1V+5O4C7Y0V2y+HMH0a086y05EUR
lJSQ==
X-Gm-Message-State: APt69E01AtCKgYRa9k8oqiRcdsQ1nd4pLBVAHp090pVOMgv5wChJrpDq iH2QCAS68O687d5AwQpHOjtEdNzKkOEYD2dLu2o=
X-Received: by [ipv6] with SMTP id xxxxxxxxxxxxxxxxxxxxx; Tue, 19 Jun 2018 19:04:39 -0700 (PDT)
MIME-Version: 1.0
References: <[e-mail]>
In-Reply-To: <[e-mail]>
From: Michael Levin <[e-mail]>
Date: Tue, 19 Jun 2018 19:04:28 -0700
Message-ID: <CAG41SRVcqVT7zR-mpwtA-Da8R62=Wk8Oe4-brwCQ+1sUu0if=[e-mail]>
Content-Type: multipart/alternative; boundary="000000000000aa82e0056f093846"
X-CMAE-Envelope: MS4wfNGeegDGE0vOp3CtFbGY/u0tzcaMlefHESF2LVd5WkInd/aPebpIhSXeQerWq/G+l1S6o5C6jfFXm+tbigRtqTC0bZiqzug2FB/Nb4FAqysQMR8fRA8Y /YEPdJ1p6WOWmuMnCxGtX6TYjBtupu+tmWfOQM4gj6maTJ7pkMabrl+DoV5vFj1NHzlJWpak/3y3Ug==
X-Nonspam: None
--000000000000aa82e0056f093846
Content-Type: text/plain; charset="UTF-8"

我试图阻止所有个人地址，但我遗漏了一些东西，需要有关可能导致此问题的更多信息，我很乐意分享。

提前感谢！

Answer 1

延迟在 Qmail SMTP 和 POP 服务器之间。

Received: by [IPv6] with POP3 id xxxx;
***Thu, 21 Jun 2018 12:09:30 -0700 (PDT)***
X-Gmail-Fetch-Info: [e-mail] 1 pop.secureserver.net 110 [e-mail]
Received: (qmail xxxx invoked by uid xxxx); 20 Jun 2018 02:04:40 -0000

顺便说一下，您可以使用以下在线工具分析标题。

https://testconnectivity.microsoft.com/MHA/Pages/mha.aspx https://mxtoolbox.com/Public/Tools/EmailHeaders.aspx

Answer 2

要解决此问题，请在 DNS 中为域 example.com 创建 DMARC 记录：

v=DMARC1;p=quarantine;pct=25;rua=mailto:[e-mail]