Wasn't sure how to search for this:
Email forward: firstname.lastname@example.org
forwards to: email@example.com
I want to block access to all-users@ for anyone who is not emailing from @domain.com or maybe blocking anyone where the email does not come through the domain.com server would be better.
Any help would be great. I imagine this would be a postfix config?
Debian Lenny, mydns, courier, ispc 188.8.131.52