On Fri, Feb 02, 2007 at 06:10:14PM +0000,
Douglas Fraser <[EMAIL PROTECTED]> wrote
a message of 64 lines which said:
> I did change the subject and To: headers to that of a new message
> but you're telling me there is some hidden header that gets brought
> over?
Yes, In-Reply-To (and References), specified in RFC 2822. To quote it:
The "Message-ID:" field contains a single unique message identifier.
The "References:" and "In-Reply-To:" field each contain one or more
unique message identifiers, optionally separated by CFWS.
And here is how they look:
Message-ID: <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>
<[EMAIL PROTECTED]>
In-Reply-To: <[EMAIL PROTECTED]>
> Software is just getting too clever these days....
These headers are extremely old (the RFC was published in 2001 but
these headers already existed) and are used by mail programs to
display threads (related groups of messages). That's why it's bad to
start a new issue by replying to a message.
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