Domains with DNS TXT v=spf1 a mx ip4:103.4.18.243 include:customer.mailguard.com.au include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx ip4:103.4.18.243 include:customer.mailguard.com.au include:spf.protection.outlook.com -all.