External Dynamic List (EDLs)

Question

Hello, 
 Is this answer still valid ? https://community.sophos.com/products/unified-threat-management/f/web-protection-web-filtering-application-visibility-control/45727/who-is-the-external-filter-list-provider 
 and is there an option to add own customized URL/domain list (A dynamic list hosted externally so that UTM can import objects&mdash;IP addresses, URLs, domains&mdash;included in the list and enforce policy.) 
 
 Thanks 
 Steve

DouglasFoster · Accepted Answer

Yes, the base data for UTM is provided by Trusted source, which Sophos uses with adjustments. There is no provision for an alternate source to use for a second opinion. 
 You can create static overrides, which is all that I have ever needed. 
 SMTP proxy supports multiple custom RBL sources. 
 You also should be able to integrate with Norton DNS. I tried once, had trouble, and rolled back before figuring out what I did wrong.