一般背景：
在法国
ISP : Completel/SFR（一些随意的东西）
服务器 Exchange 2013
梭鱼 300
通常，大约有 8/10 的 Gmail 邮件到达我们的服务器时都会出现很大的延迟，这次是 11 个小时。
以下是一些标题：
Received: from MES-02.nutri.local (2002:c004:dd3::c004:dd3) by
MES-02.nutri.local (2002:c004:dd3::c004:dd3) with Microsoft SMTP Server (TLS)
id 15.0.1293.2 via Mailbox Transport; Mon, 25 Sep 2017 21:04:37 +0200
Received: from MES-02.nutri.local (2002:c004:dd5::c004:dd5) by
MES-02.nutri.local (2002:c004:dd5::c004:dd5) with Microsoft SMTP Server (TLS)
id 15.0.1293.2; Mon, 25 Sep 2017 21:04:26 +0200
Received: from barracuda.mydomain.fr (192.4.13.249) by MES-02.nutri.local
(192.4.13.211) with Microsoft SMTP Server id 15.0.1293.2 via Frontend
Transport; Mon, 25 Sep 2017 21:04:26 +0200
X-ASG-Debug-ID: 1506366186-0d0e1e108216f820001-ga6i4b
Received: from mail-oi0-f44.google.com (mail-oi0-f44.google.com [209.85.218.44]) by barracuda.mydomain.fr with ESMTP id RwbNnxEIffvuOeoq for <[email protected]>; Mon, 25 Sep 2017 21:03:06 +0200 (CEST)
X-Barracuda-Envelope-From: [email protected]
X-Barracuda-Effective-Source-IP: mail-oi0-f44.google.com[209.85.218.44]
X-Barracuda-Apparent-Source-IP: 209.85.218.44
X-Barracuda-User-Whitelist: [email protected]
Received: by mail-oi0-f44.google.com with SMTP id r20so8449350oie.0
for <[email protected]>; Mon, 25 Sep 2017 12:03:06 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20161025;
h=mime-version:from:date:message-id:subject:to;
bh=101hk4XXS8wkNTIWAxt3MC8m34P5hCl31RchaG6seM0=;
b=IC7CdJVSlzouSKuGIt42+RSwzDLM8gNDhZJDShFFWI613VWrXC8rV9l/QtHqdIeocM
SUMr4SldHRlBW1UCDm83SyhlkhWace52np3Pm9TjDaxDJRcdtOJEhf0oIuiLUBPTG/xA
8JiyHxtFiE0dH8dF+QH75p2/CfMZhoU3MXwf/2zsJG4Qo43a6tl/47860WFF+r5SzM0k
dj5RUUF6/SrBSc+F+UGu1TwmfOw/h07qfK95cUuw3prtw5i17Sq1jEdssXAif/FjN+tQ
I4aGmZxOYmlecTyxOzQFIUgVtYpyJrEdV2o18H0aMEP25Xp9p4wYZzzRS76PlLMO6aPj
a1FA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20161025;
h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
bh=101hk4XXS8wkNTIWAxt3MC8m34P5hCl31RchaG6seM0=;
b=P0xZc+lGT4OIayfe6Zqwe7RJSW6EBQJWVk2AMSpAOipMwQVSdyCnozLdLltis9+pmP
ByTdBkBo8CGdLaZBpqpXToBMGUUjLph3zBEn1EpWTuEZNnGogAL5KyaiNU3NU+vV9B6p
e1Q+T16BASZKyY9qLqBokNtqB9g+WJ8vpPJXkvxCSKqFKrdRP0ysKnVIAiEcRbuGdmNZ
0Q2oIZLarFYUeK4aeTZQJb4ThViz4xdWCa8mXxJgNC8mMmnOfS2CIXxIg94qHnUsz4a2
s00RE1CQ7JwktYEa+VxuKE8eVgGx+6GqEo23BneRZde0CrIO0EHb4p29tW6pvgqgrg64
SfJw==
X-Gm-Message-State: AHPjjUi5m4CGwk1Y35749OmQqHzDhfuNvCO0PJ6eEYE++iSEvZRKIil5
p2zjF8JtNvF3fSU+fxakPPeY/3iMWXCYJ5wLsRk=
X-Google-Smtp-Source: AOwi7QDz8/EQaHA6s1eBYIokK60fVzXpZTOEs+XyQVBFICmN4B3B1UMHOfEhE2frsShPRTreSwfbNU/z2x8h6/5S9r4=
X-Received: by 10.202.66.10 with SMTP id p10mr8628072oia.211.1506326236015;
Mon, 25 Sep 2017 00:57:16 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.74.174.8 with HTTP; Mon, 25 Sep 2017 00:57:11 -0700 (PDT)
Received: by 10.74.174.8 with HTTP; Mon, 25 Sep 2017 00:57:11 -0700 (PDT)
From: Emmanuel Valou <[email protected]>
Date: Mon, 25 Sep 2017 09:57:11 +0200
Message-ID: <CAKtqvW=1yn2=opFpV-xtobHv3L0CoU0k24x4iDnHvffYN6y-NA@mail.gmail.com>
Subject: Vp
To: [email protected]
X-ASG-Orig-Subj: Vp
Content-Type: multipart/mixed; boundary="001a113dde7e3837200559fee8c5"
X-Barracuda-Connect: mail-oi0-f44.google.com[209.85.218.44]
X-Barracuda-Start-Time: 1506366186
X-Barracuda-URL: https://antispam.mydomain.fr:443/cgi-mod/mark.cgi
X-Virus-Scanned: by bsmtpd at mydomain.fr
X-Barracuda-Scan-Msg-Size: 26
X-Barracuda-BRTS-Status: 1
Return-Path: [email protected]
X-MS-Exchange-Organization-Network-Message-Id: f1bb64ed-9fb3-4ff8-1905-08d504483ec9
X-MS-Exchange-Organization-AVStamp-Enterprise: 1.0
X-MS-Exchange-Organization-AuthSource: MES-02.nutri.local
X-MS-Exchange-Organization-AuthAs: Anonymous
mxtoolbox 告诉我问题出在我们的 Barracuda 和 Gmail 之间。
但是，要解决这个问题，我们必须这么做还是谷歌必须这么做？
那又怎么样？
答案1
Google 不会采取任何行动 - 如果您尝试联系他们，他们可能会忽略您 - Google 的电子邮件传递平台没有任何问题。问题出在您这边。
您需要在 Barracuda 中查找投递尝试的日志并查看失败的原因。如果直到 11 小时都没有投递尝试的踪迹，那么我会查看您的网络之外的问题。
MX Toolbox 只会告诉您存在交付延迟 - 而不会告诉您原因，因为标头不会显示。