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There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:spf-00312301.pphosted.com include:_spf.psm.knowbe4.com -all.

Top Domains with TXT set to v=spf1 include:spf.protection.outlook.com include:spf-00312301.pphosted.com include:_spf.psm.knowbe4.com -all