When I first set this up i was mad as nails at this too. I mean getting a throw in service was half the reason i signed up for this whole “one” business. That being said, I deactivated and re-activated the plugin and now the reply to can be set and works. unfortunately it also replies to the email in the delivery dashboard, which does not seem to be disable-able… I really dont want a second copy of the mail I just relied to…