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

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

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