Domains with DNS TXT v=spf1 a mx include:mail.zendesk.com include:spf.protection.outlook.com include:authsmtp.com include:spf.braintreegateway.com include:_spf.activetrail.com include:zcsend.net -all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:mail.zendesk.com include:spf.protection.outlook.com include:authsmtp.com include:spf.braintreegateway.com include:_spf.activetrail.com include:zcsend.net -all.