Proper mail headers

[Duane Whitty]

Hi everyone,

I wanted to check to see if I am using the proper etiquette when filling 
in my headers, especially when responding to someone's post.  Should I 
just let let my reply go to the person named in Reply-To or should I 
reply to the list and CC the poster, or is it the other way around?

Thanks,

--Duane Whitty

duane @greenmeadow.ca