[nzlug] Thread Highjack??

[Jamie Curtis]

Hey,

> Now this is interesting... I hit "reply" on a random (nzlug) post (lazy
> way to get correct recipient), erased the text and changed the subject
> line. The recipient field is just "NZLUG Mailing List
> <nzlug at linux.net.nz>" ... so what else should I have done? (i.e. how
> does the list decide a given post belongs in a given thread?)

Tell your e-mail client to show you all headers, you'll see that Karl's 
message has in the headers:
 	Message-ID: <20070524101919.GA8511 at L400b>

Then skip  forward to your reply to him, and you'll see your client has 
inserted a
 	In-Reply-To: <20070524101919.GA8511 at L400b>

header.

Every mail client has to generate a unique message ID for every e-mail it 
sends (often made up of some combination of a timestamp, PID and 
hostname), treaded mail clients track this ID and anyone who replies to it 
and presents that as a single thread.

The only way (short of manually hacking the message headers) is to start a 
new e-mail (which won't have an In-Reply-To) and copy and paste the e-mail 
address from an old post.

Cheers,

Jamie