Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com include:spf4.sbr-master.net include:sendgrid.net -all

There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com include:spf4.sbr-master.net include:sendgrid.net -all.

Top Domains with TXT set to v=spf1 a include:spf.protection.outlook.com include:spf4.sbr-master.net include:sendgrid.net -all