Dennis Brown wrote:
Dan and Mac Mail.app users and anyone who replies to messages,
I have noticed that Mail.app seems to put seemingly unrelated threads
into an existing thread at times. I think I see a possible
explanation for this. In addition to the usual method of looking at
the subject text, I think mail.app also fingerprints messages
somehow, so it knows when a reply is to that message --even if the
subject line is altered. So if somebody starts a new thread by
replying to a thread I started or replied to, just to get the header
info, then replaces the body and subject lines to a new topic, my
Mail.app assumes it is still related to the original message. I just
tested out this theory by replying to a thread I started, but I
changed everything about the message except the To: line. Sure
enough the message came back threaded to the unrelated message I
started it from.
That seems likely - though it's not particularly the mail.app - it's
been part of the mail standard for 20+ years.
The headers for the mail I'm replying to included the following lines:
Message-id: <[EMAIL PROTECTED]>
In-reply-to: <[EMAIL PROTECTED]>
and these are used (probably along with others) to decide what's a
thread and what isn't.
(See rfc 822 published in 1982 !!)
A case of too smart for its own good!
A case of doing exactly what the standard says it should do.
--
Alex Tweedly http://www.tweedly.net
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