Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:mktomail.com include:docebosaas.com include:mailgun.org include:transmail.net -all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:mktomail.com include:docebosaas.com include:mailgun.org include:transmail.net -all.