Hello, Is there a way for me to block mail that claims its from a certain domain, based on my own valid ip address list?
Example: myserver.com - IP address 1.2.3.4 If a messages comes in from any server other than 1.2.3.4 for domain myserver.com reject it? I know SPF/DKIM/DMARC would also help here, but trying to almost make my own ACL. Thanks -- Thanks! Joey
