Domains with DNS TXT v=spf1 ip4:52.165.135.234 ip4:104.43.137.81 include:spf.protection.outlook.com include:spf.constantcontact.com -all
There is 1 domain that have DNS TXT set to v=spf1 ip4:52.165.135.234 ip4:104.43.137.81 include:spf.protection.outlook.com include:spf.constantcontact.com -all.