How to make GMail continue a conversation?

Question

When providing the same subject line doesn't work?

I'd like to send 2 emails and make them appear in one conversation. Sadly, the second one always starts a new conversation. How to avoid this?

Both mails are sent directly to my.address@gmail.com

Both have almost the same headers and the same UTF-8 encoded subjects:

Received-SPF: pass ...
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
Message-Id: ... (Different for both messages. Should I add my own id?)
Date: ...

Any clues?

I disagree, Chris. Asking about how to work with a protocol most certainly is programming related, especially one like this. — Serafina Brocious, Jan 29 '09 at 14:50
It depends; he might want to write a program to send messages to a Gmail account and have them appear in the same conversation. It's kind of a stretch, but I can definitely see wanting to do this programmatically in some cases. — Eli Courtwright, Jan 29 '09 at 14:50
Duplicate of http://stackoverflow.com/questions/372449/header-in-gmail-for-thread-hinting — Paul Tomblin, Jan 29 '09 at 14:51

score 1 · Accepted Answer · answered Jan 29 '09 at 14:49

1

Yes, the message ID is what's important here. The client uses it to determine flow.

answered Jan 29 '09 at 14:49

Serafina Brocious

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No, Message-ID doesn't have anything to do with it, except when you make the second message you should put the first one's Message-ID in the "In-Reply-To" header. – Paul Tomblin Jan 29 '09 at 15:44
My mistake, I read a quick summary of a document and got the wrong impression. This should be unaccepted. – Serafina Brocious Jan 29 '09 at 16:13
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@CodyBrocious You may want to update your answer. Probably not everyone reads the comments :P – exhuma May 06 '14 at 11:15

How to make GMail continue a conversation?

1 Answers1