Domains with DNS TXT v=spf1 a include:_spf.salesforce.com include:spf.protection.outlook.com include:spf.meadinformatica.it -all
There is 1 domain that have DNS TXT set to v=spf1 a include:_spf.salesforce.com include:spf.protection.outlook.com include:spf.meadinformatica.it -all.