Doug,

Message-ID is unique. However, what I can see in my mail is that all subsequent emails (after JIRA created message) have its Message-ID in their In-Reply-To field.

Say,
Subject: [jira] Created: (HADOOP-6110) test-patch takes 45min!
Thread-Topic: [jira] Created: (HADOOP-6110) test-patch takes 45min!
Thread-Index: Acn2Jd4/MZg/3jVETQKT5ZEGzVtNCA==
Message-ID: <1892144747.1245997027374.javamail.j...@brutus>
List-Help: <mailto:[email protected]>

and

Subject: [jira] Updated: (HADOOP-6110) test-patch takes 45min!
Thread-Topic: [jira] Updated: (HADOOP-6110) test-patch takes 45min!
Thread-Index: Acn4rGYcaU6FaceJSyGggrQ+1INmpg==
Message-ID: <1159605925.1246274687243.javamail.j...@brutus>
List-Help: <mailto:[email protected]>
List-Unsubscribe: <mailto:[email protected]>
In-Reply-To: <1892144747.1245997027374.javamail.j...@brutus>

I don't see In-Reply-To field in the example you've sent to me. Is it because some tags are being stripped out by mail archiving software?

Cos

On 7/1/09 1:29 PM, Doug Cutting wrote:
Konstantin Boudnik wrote:
Actually, Thunderbird and Mutt are at least two which does thread JIRA's
threads properly.

The way they do so is exactly by using Message-ID and In-Reply-To fields
of a RFC-822 header.

The Message-ID is different for each message, and is thus alone not
useful for threading.  I don't see an In-Reply-To header in Jira-sent
messages, nor a References header.  These are the preferred means for
threading according to RFC2822, although some readers thread by subject
too.  Thus all comments relative to an issue may be threaded, but not
together with other updates, like assignment, attachment, etc., since
these use different subjects.

For example, do you see these headers in http://tinyurl.com/lw3cse?

Doug




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