Domains with DNS TXT v=spf1 +a +mx +ip4:65.99.252.186 +include:relay.mailchannels.net -all

There is 1 domain that have DNS TXT set to v=spf1 +a +mx +ip4:65.99.252.186 +include:relay.mailchannels.net -all.

Top Domains with TXT set to v=spf1 +a +mx +ip4:65.99.252.186 +include:relay.mailchannels.net -all