Domains with DNS TXT v=spf1 +a +mx +ip4:163.53.229.3 +include:spf.protection.outlook.com -all

There is 1 domain that have DNS TXT set to v=spf1 +a +mx +ip4:163.53.229.3 +include:spf.protection.outlook.com -all.

Top Domains with TXT set to v=spf1 +a +mx +ip4:163.53.229.3 +include:spf.protection.outlook.com -all