Domains with DNS TXT v=spf1 include:spf.protection.outlook.com include:spf1.stlwerkt.nl include:spf2.stlwerkt.nl include:spf3.stlwerkt.nl -all
There is 1 domain that have DNS TXT set to v=spf1 include:spf.protection.outlook.com include:spf1.stlwerkt.nl include:spf2.stlwerkt.nl include:spf3.stlwerkt.nl -all.