Is there currently any way of controlling the 'return-path' of forum emails, or is it always the primary administrator? We would quite like to throw these into their own 'bounce' account, but it doesn't seem possible.
Being able to further control this on a course-by-course basis would be even nicer!
As far as I can tell, the reply-to depends on the email visibility setting for each user. If email address is set to be private, then the site's no-reply address is used. You should set it to something different than admin's address. It does not have to be an existing address, so noreply@yourdomain should work fine.