[Peace-discuss] Why is peace-discuss Cc:ing the poster?

[J.B. Nicholson]

I wrote:
> Since 2020 began (or thereabouts) I've noticed that peace-discuss adds a Cc: to the poster on each 
> post to the list. Why? Can this be disabled?

A correction: peace-discuss does this when one sets a Reply-To: header pointing to the list address.

How should I properly indicate to this list that I will pick up replies posted to the list on the 
list, and that I don't need another copy sent to me?