Domains with DNS TXT v=spf1 a mx include:spf.smartemailing.cz include:spf.protection.outlook.com a:smtp3.arakis.cz ~all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:spf.smartemailing.cz include:spf.protection.outlook.com a:smtp3.arakis.cz ~all.