On 12-1-13 17:39:50 Garry T. Williams wrote:
Without the required headers, there is no way to do proper
threading.
It can only come close using Subject header value, date, and time.
By the way, this is spelled out in RFC-2822. See
http://www.ietf.org/rfc/rfc2822.txt
Also, by the way, Microsoft ignores this RFC in its clients. :-(
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Garry T. Williams