Add new domains to high trust sender list (#665)

Co-authored-by: Sorted Order Validation <[email protected]>

Author: JFarina5

high_trust_sender_root_domains.txt

@@ -185,7 +185,9 @@ facebookenterprise.com
 facebookmail.com
 fastcompany.com
 fbi.gov
+federatedinsurance.com
 fedex.com
+fedins.com
 fidelity.com
 figma.com
 fireeyecloud.com