Domains with DNS TXT v=spf1 include:spf.mandrillapp.com include:sendgrid.net include:spf.protection.outlook.com -all

There are 22 domains that have DNS TXT set to v=spf1 include:spf.mandrillapp.com include:sendgrid.net include:spf.protection.outlook.com -all. The top 22 records ordered by domain rank are listed below.