Domains with DNS TXT v=spf1 ip4:104.21.18.73 include:spf.protection.outlook.com include:_spf.exactonline.co.uk -all
There is 1 domain that have DNS TXT set to v=spf1 ip4:104.21.18.73 include:spf.protection.outlook.com include:_spf.exactonline.co.uk -all.