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