Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:authsmtp.com include:spf.ess.barracudanetworks.com -all

There are 13 domains that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:authsmtp.com include:spf.ess.barracudanetworks.com -all. The top 13 records ordered by domain rank are listed below.

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