To stop Exim from being an Open Relay, you need to adjust the acl_smtp_rcpt ACL as follows:
deny domains = !+local_domains
message = Relaying denied
*Note: You have to decide what "local_network" means - for example, you might want to define it as 192.168.0.0/16.
Article ID: 314, Created: 4/29/2025 at 2:05 PM, Modified: 4/29/2025 at 2:05 PM