Domains with DNS TXT v=spf1 mx ip4:206.81.21.223 ip4:185.224.199.97 include:relay.mailchannels.net include:spf.supremebox.com -all
There is 1 domain that have DNS TXT set to v=spf1 mx ip4:206.81.21.223 ip4:185.224.199.97 include:relay.mailchannels.net include:spf.supremebox.com -all.