我正在审查我正在开发的应用程序使用的邮件发送服务的设置（该服务是 mailchimp 收购的，名为山魈）。
我想确定，当我从该服务向我自己（gmail.com）发送测试电子邮件时，流量是否邮件服务器之间使用 TLS。我可以访问发送给我的电子邮件（我已在下方添加了标题）。
我打算询问供应商是否支持此功能，但我还希望了解是否可以亲自验证他们告诉我的内容。
Delivered-To: [email protected]
Received: by 10.79.123.142 with SMTP id k136xxxxxxxxxxxx;
Tue, 5 Jul 2016 07:29:11 -0700 (PDT)
X-Received: by 10.37.97.11 with SMTP id v11mxxxxxxxxxxxx.36.14nnnnnnnnnnn;
Tue, 05 Jul 2016 07:29:11 -0700 (PDT)
Return-Path: <[email protected]>
Received: from mail180-123.mandrillapp.com (mail180-123.mandrillapp.com. [a.b.c.d])
by mx.google.com with ESMTPS id mmmmmmmmmmm.nnn.2016.07.05.07.29.11
for <[email protected]>
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
Tue, 05 Jul 2016 07:29:11 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates a.b.c.d as permitted sender) client-ip=a.b.c.d;
Authentication-Results: mx.google.com;
dkim=pass [email protected];
dkim=pass [email protected];
spf=pass (google.com: domain of [email protected] designates a.b.c.d as permitted sender) [email protected];
dmarc=fail (p=NONE dis=NONE) header.from=gmail.com
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; s=mandrill; d=mail180-123.mandrillapp.com;
h=From:Sender:Subject:Reply-To:To:Message-Id:Date:MIME-Version:Content-Type; [email protected];
bh=xxxxxxxxxxxxxxxxxxxxxxx+8fQ=;
b=n+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxxxxxxxxxxxx+Z+tSJV/zEtr
xxxxxxxxx+xxxxxx+xxxxxxxxxxxxxxxxxxxxxx/xxx/xxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxx=
Received: from pmta03.mandrill.prod.suw01.rsglab.com (127.0.0.1) by mail180-123.mandrillapp.com id xxxxxxxxxxxx for <[email protected]>; Tue, 5 Jul 2016 14:29:11 +0000 (envelope-from <[email protected]>)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mandrillapp.com;
[email protected]; q=dns/txt; s=mandrill; t=1467728951; h=From :
Sender : Subject : Reply-To : To : Message-Id : Date : MIME-Version :
Content-Type : From : Subject : Date : X-Mandrill-User :
List-Unsubscribe; bh=xxxxxxxxxxxxxxxxxxxxxxxx+xxxxxxxxxxxxxxxxxx=;
b=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx+xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxx=
From: recipient <[email protected]>
Sender: recipient <[email protected]>
Subject: =?utf-8?Q?Subject
Return-Path: <[email protected]>
Received: from [208.nnn.nnn.nnn] by mandrillapp.com id xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx; Tue, 05 Jul 2016 14:29:11 +0000
Reply-To: <[email protected]>
To: ClientSeq ClientMcD <[email protected]>
Message-Id: <nnnnnnnn.nnnnnnnn142911.nnnnnnnn1aadf2.nnnnnnnn@mail180-123.mandrillapp.com>
Date: Tue, 05 Jul 2016 14:29:11 +0000
MIME-Version: 1.0
答案1
行中提到了 TLS
Received: from [...] (mail180-123.mandrillapp.com. [...])
by mx.google.com with ESMTPS [...]
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
很明显，从 Mandrill 到 GMail 的连接确实受到了 TLS 保护。
同样，ESMTPS（安全 ESMTP）被列为传输协议，请参阅RFC 3848。