Hi Tom:

In message
<1458580078.01.0.729648572724.issue2550803@psf.upfronthosting.co.za> ,
Tom Ekberg writes:
>Having 3 settings sounds fine to me.
>
>As to In-Reply-To, I don't remember exactly why I did this. I think it was 
>to indicate which tracker the email came from. That information is already 
>present at to the bottom of the email, so it appears that setting In-Reply-
>To is not really necessary.

Also In-Reply-To should be the message id of the message being replied
to so emal client can thread properly. I would suggest not applying
that part of the patch..