Hexamail Guard Administration Guide - Content - Link Content
Detect geographic location of URLs
Enable geolocation detection of URLs. This identifies the likely geographic location of contained URLs and can thereby be used to weight, block or delete email with links to websites in specific countries.
Use this to weight block or delete email from countries from which it is unlikely you receive legitimate email
If a URL contained in an email mismatched the email sending IP location you can choose to mark, weight, block or delete the email