如何让Gmail继续交谈？ [重复]

Question

当提供的相同主题行不起作用？

我想送2个电子邮件，使他们出现在一个谈话。可悲的是，第二个总是开始一个新的对话。如何避免这种情况？

这两个邮件直接发送到my.address@gmail.com

两个具有几乎相同的标题和相同的UTF-8编码的主题：

Delivered-To: my.account@gmail.com
Received: by ...
Return-Path: ...
Received: ...
Received-SPF: pass ...
Authentication-Results: mx.google.com; spf=pass ...
Received: from mm_www by ...
To: my.account@gmail.com
Subject: =?UTF-8?...=?=
From: notification@my.domain
Content-Type: text/plain; charset=UTF-8; format=flowed
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
X-Mailer: PHP
Message-Id: ... (Different for both messages. Should I add my own id?)
Date: ...

任何线索？

Answer 1

是，邮件ID是什么是重要的在这里。客户端使用它来确定流量。