Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com ip4:50.28.8.45 -all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com ip4:50.28.8.45 -all.