Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com include:eu.mailgun.org include:spf-westeu.emailsignatures365.com -all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com include:eu.mailgun.org include:spf-westeu.emailsignatures365.com -all.