Domains with DNS TXT v=spf1 a include:spf.skylarnet.nl include:relay.insiders.nl include:_spf.worldofdocmaster.com -all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.skylarnet.nl include:relay.insiders.nl include:_spf.worldofdocmaster.com -all.