E-mail thread identification
How do e-mail clients know whether or not an e-mail is part of a thread? (For example, Thunderbird can fold e-mails into threads.) Do they just guess based on the Subject line, or do they know for certain based on an e-mail field?
I was planning to tackle some more advanced filter programming on my Postfix server. |
It's in the headers of the email message
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Its the email subject,
If you modify the subject its gone out of that thread. |
When you look at the plain email file, you will find entries like:
Message-ID: References: In-Reply-To: with some unique values behind which will be used. If the email client can’t use it for threads, it will sometimes use the subject. |
Correct, as above :)
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