Domains with DNS TXT v=spf1 a mx include:sendgrid.net include:spf.protection.outlook.com include:redhatsociety.com include:_spf.smtp.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:sendgrid.net include:spf.protection.outlook.com include:redhatsociety.com include:_spf.smtp.com -all.