Christian Brandt: > TL;DR can I reject incoming connection directly in postfix at a very > early state, way before HELO/EHLO handling? Right after receiving a new > TCP connection? Preferably not just REJECTing but DROPing so the other > side doesn't even know it is ignored.
Use a postscreen_access_list reject action. http://www.postfix.org/POSTSCREEN_README.html Wietse
