Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com +ip4:144.217.66.63 -all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:spf.constantcontact.com +ip4:144.217.66.63 -all.