Follow the steps below to enable anti-spoofing for a domain that has been added to SpamTitan. Check the breadcrumb to ensure you are at the domain level:
From the side-bar menu select Overview and then select the Anti-Spoofing tab.
To enable anti-spoofing, move the Anti-Spoofing slider to ON (default: OFF).
Instead of specifying an IP in the IP & Hostnames table, you can use your SPF record to determine if a sender is valid. To do this, move the Use SPF Record for IP Validation slider to ON (default: OFF).