Domains with DNS TXT v=spf1 +ip4:221.121.138.138 include:spf.protection.outlook.com include:spf.smtp2go.com -all

There is 1 domain that have DNS TXT set to v=spf1 +ip4:221.121.138.138 include:spf.protection.outlook.com include:spf.smtp2go.com -all.

Top Domains with TXT set to v=spf1 +ip4:221.121.138.138 include:spf.protection.outlook.com include:spf.smtp2go.com -all