Domains with DNS TXT v=spf1 +a include:secureserver.net include:spf.protection.outlook.com include:_spf.psm.knowbe4.com -all

There is 1 domain that have DNS TXT set to v=spf1 +a include:secureserver.net include:spf.protection.outlook.com include:_spf.psm.knowbe4.com -all.

Top Domains with TXT set to v=spf1 +a include:secureserver.net include:spf.protection.outlook.com include:_spf.psm.knowbe4.com -all