Domains with DNS TXT v=spf1 include:spf.protection.outlook.com ip4:27.50.90.173 ip4:203.63.45.134 include:customer.mailguard.com.au -all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com ip4:27.50.90.173 ip4:203.63.45.134 include:customer.mailguard.com.au -all.