Configuring proxies

1. Go to System > Network > Interface, select port1, and click Edit.
2. Expand SMTP Proxy.
3. Set Incoming connections to Drop.
4. Set Outgoing connections to Pass through.
5. Enable Local connections.
6. Click OK.
7. Select port2 and click Edit.
8. Set Incoming connections to Proxy.
9. Set Outgoing connections to Drop.
10. Disable Local connections.
11. Click OK.