KMail management of mail lists

I am just not geek enough to figure this out: In the folder pane, when I "right-click" on the mail list folder name, and select "New Message to Mailing-List...," the new composer window populates the Identity and To text boxes but does not include my signature in the text window. Conversely, when I select the mail list in the folder pane and then select the New Message toolbar icon or the same from the File menu, the compose window includes my signature from my template but fails to populate the To text box. I want the text boxes populated for the mail list and the text window to already include my signature. How do I achieve that? Darrell