As I yesterday had this issue with a list message from Phil Weir (who does sometimes set a Reply-To header to the list plus his personal address) again:
I'm probably not aware of the latest stage in this regard, but wasn't there a poll a while ago (and an agreement afterwards), that a Reply-To header shouldn't be ignored anymore when replying to a list message by clicking the standard Reply button...?
Michael Heydekamp Co-Admin freexp.de Düsseldorf/Germany