Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:sendgrid.net include:mailgun.org include:relay.mailchannels.net -all

There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:sendgrid.net include:mailgun.org include:relay.mailchannels.net -all.

Top Domains with TXT set to v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:sendgrid.net include:mailgun.org include:relay.mailchannels.net -all