Domains with DNS TXT v=spf1 a mx ptr a:mailrelay2.yellowserve.net a:mailrelay1.yellowserve.net include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx ptr a:mailrelay2.yellowserve.net a:mailrelay1.yellowserve.net include:spf.protection.outlook.com -all.