Our mail system has fallen victim to a phisher email in the last couple of days. I was wondering if there is a way in postfix to keep our users from being able to respond to the phisher's email. I have seen lots of article on blocking it coming in from the outside. But I want to block mail internal going out to a specific address.
If this has been discussed before please forgive as I am not exactly sure of the keywords to use in this search. Please point me in the right direction in finding this information
