RE: Have not yet been able to figure out how to have a different Reply-To to From.
Do you mean Form? The auto reply (to the submitter) already has an option which you can set the reply from name and email. This setting is on the Connections : Settings admin page under the Form tab in the Email Notifications section. Look for the “Auto Reply From Name” and “Auto Reply From Email” options.
The submission notice (admin notification) email does not a reply to setting. I’d have to look at the code to confirm, but I’m pretty certain the email address of the submitter is used as the reply to address.
Hope this helps!