[Imap-protocol] thread computation algorithms and Exchange

[Johannes Berg]

On Mon, 2007-04-09 at 09:33 -0700, Bill Janssen wrote:

> I'm looking at a collection of email mostly sent from Exchange
> servers, and notice that it by and large does not support the
> "References" or "In-Reply-To" headers, but does always contain headers
> called "Thread-Topic" and "Thread-Index".  The "Thread-Index" field
> seems to contain a BASE64 string which contains the "Thread-Index" of
> its parent message as a prefix.
> 
> Has anyone tried to understand or reverse-engineer this Exchange
> information to describe a thread computation algorithm that works
> better for messages with this information?

Look at the evolution source code, it contains quite a bit of
information on this.

johannes
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