Domains with DNS TXT v=spf1 a a:mailgw1.knv.de a:mailgw2.knv.de include:hostedoffice.ag include:secure-mailgate.com include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 a a:mailgw1.knv.de a:mailgw2.knv.de include:hostedoffice.ag include:secure-mailgate.com include:spf.protection.outlook.com -all.