Domains with DNS TXT v=spf1 ip4:66.84.6.17 +a +mx +ip4:199.204.248.128 +include:relay.mailchannels.net -all

There are 155 domains that have DNS TXT set to v=spf1 ip4:66.84.6.17 +a +mx +ip4:199.204.248.128 +include:relay.mailchannels.net -all. The top 50 records ordered by domain rank are listed below.