Domains with DNS TXT v=spf1 a mx a:wh3.nf-hosting.de include:mailgun.org include:spf.flowmailer.net include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx a:wh3.nf-hosting.de include:mailgun.org include:spf.flowmailer.net include:spf.protection.outlook.com -all.