Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com ip4:54.66.162.113 include:mailgun.org include:customer.mailguard.com.au -all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com ip4:54.66.162.113 include:mailgun.org include:customer.mailguard.com.au -all.