I have two internet providers connected to my router: 1st ISP 192.168.1.0/24; 2nd ISP 192.168.2.0/24. And I need to re-route all email traffic via 2nd ISP. So, let’s do that: /ip firewall mangle add chain=prerouting action=mark-routing new-routing-mark=”POP3 traffic” passthrough=no protocol=tcp dst-port=110 add chain=prerouting action=mark-routing new-routing-mark=”IMAP traffic” passthrough=no protocol=tcp dst-port=143 add chain=prerouting action=mark-routing new-routing-mark=”SMTP traffic” passthrough=no […]