Domains with DNS TXT v=spf1 mx a:spf.mas.t-systems-service.com include:spf.protection.outlook.com ~all
There are 3 domains that have DNS TXT set to v=spf1 mx a:spf.mas.t-systems-service.com include:spf.protection.outlook.com ~all. The top 3 records ordered by domain rank are listed below.