Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com include:spf.hornetsecurity.com include:ispgateway.de -all
There are 2 domains that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com include:spf.hornetsecurity.com include:ispgateway.de -all. The top 2 records ordered by domain rank are listed below.