Domains with DNS TXT v=spf1 include:cust-spf.exacttarget.com include:support.zendesk.com include:mail.zendesk.com -all

There are 879 domains that have DNS TXT set to v=spf1 include:cust-spf.exacttarget.com include:support.zendesk.com include:mail.zendesk.com -all. The top 50 records ordered by domain rank are listed below.