Allow properly linked replies in the mail archives

Currently , when viewing a message in the xiph web mail archive, for example 
http://www.xiph.org/archives/advocacy/0491.html, there is a way to reply to the 
author, by clickinf the link with his name at the top , by "From:".
This automatically fill in the right subject, but does not fill in the right In-
Reply-To field, so the mail is not properly linked to the original message.

Also I miss a link for replying to the mail list. Again a proper In-Reply-To 
field should be used. Otherwise the message would not be put in the right 
thread in the "thread" view.

Currently I construct manually an URL for replying, like : 
mailto:someone@somewhere.org&Subject=Re:Something?In-Reply-
To=<some_id.xx.yy.zzz>

I get the proper id by viweing the HTML source.