Subject threading and In-Reply-To

[Ian Wilson <i.wilson@considered.com.au>]

Hello all,

I am new to this list, but I have gone through the archive using various 
search terms and haven't been able to find any discussion on my problem.  I 
am also new to mhonarc .

I am involved with a mailing list that has 500 or so members using a 
variety of mail clients.  Some of these correctly support the In-Reply-To 
header others don't.  The problem is that some (many I suspect) people will 
start a new thread by doing a reply-to an existing thread and then changing 
the subject - so we can end up with threading like:

[PROTEL EDA USERS]: Protel / Specctra problems, Todd Conard
·	Re: [PROTEL EDA USERS]: Protel / Specctra problems, Michael Reagan
·	·	[PROTEL EDA USERS]: Drill Drawing symbol reference chart, D. Chris 
Mackensen
·	·		RE: [PROTEL EDA USERS]: Drill Drawing symbol reference chart, Tony 
Karavidas
·	·		Re: [PROTEL EDA USERS]: Drill Drawing symbol reference chart, Abd 
ul-Rahman Lomax
·	·		Re: [PROTEL EDA USERS]: Drill Drawing symbol reference chart, Geoff 
Harland
·	.	Re: [PROTEL EDA USERS]: Protel / Specctra problems, Todd Conard
·	·	.	Re: [PROTEL EDA USERS]: Protel / Specctra problems, Peter Bennett
·	·	.	Re: [PROTEL EDA USERS]: Protel / Specctra problems, Michael Reagan
·	.	[PROTEL EDA USERS]: Sch3 Library Editor Defaults., Ian
·	·	.	RE: [PROTEL EDA USERS]: Sch3 Library Editor Defaults., Eric Bobillier

Clearly there are actually three threads here.  How can I best get the 
archive to thread something like this? I want the thread based view but it 
would good if the threading was a little more reliable.

I have requested that people start a new message (and hence thread) when 
they want to create a new discussion thread but not everyone will wish to 
do this.

thanks,
Ian Wilson