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