Domains with DNS TXT v=spf1 ip4:52.15.175.226 include:relay.mailchannels.net ip4:72.249.48.160 +a +mx include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 ip4:52.15.175.226 include:relay.mailchannels.net ip4:72.249.48.160 +a +mx include:spf.protection.outlook.com -all.