Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:mailgun.org include:mail.zendesk.com -all

There are 34 domains that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:mailgun.org include:mail.zendesk.com -all. The top 34 records ordered by domain rank are listed below.