Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:_spf.psm.knowbe4.com ~all

There are 29 domains that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:_spf.psm.knowbe4.com ~all. The top 29 records ordered by domain rank are listed below.