Domains with DNS TXT v=spf1 a include:spf.cesky-hosting.cz include:spf.protection.outlook.com include:npx.cz include:spf.smartemailing.cz ~all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.cesky-hosting.cz include:spf.protection.outlook.com include:npx.cz include:spf.smartemailing.cz ~all.