reply-to

Without getting into a philosophical discussion about the merits of having reply-to go to the list or not, I find that applying all the instructions I have been able to dig up from this list and the FAQ still leaves me with a list which does not force all replies to the list. I've edited the lines indicated in rc.submit, added the rc.local.s20 file, etc. and still no joy. I've tested this from an address with no default reply-to and one with, and the result is always the same - reply-to the sender, not the list. If I manually reply back to the list, from that point forward all is well. How do I get the first message in a thread to reply-to the list, please. TIA Joe