Domains with DNS TXT v=spf1 +a +mx +ip4:50.87.144.15 +include:spf.protection.outlook.com -all

There are 28 domains that have DNS TXT set to v=spf1 +a +mx +ip4:50.87.144.15 +include:spf.protection.outlook.com -all. The top 28 records ordered by domain rank are listed below.