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

There are 3 domains that have DNS TXT set to v=spf1 +a +mx include:spf.protection.outlook.com include:spf.ess.barracudanetworks.com include:spf.mandrillapp.com include:_spf.psm.knowbe4.com ~all. The top 3 records ordered by domain rank are listed below.

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