Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:mail.zendesk.com include:my.billit.be include:spf.flowmailer.net ~all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:mail.zendesk.com include:my.billit.be include:spf.flowmailer.net ~all.