Domains with DNS TXT v=spf1 +a +mx +ip4:207.55.240.13 +include:relay.mailchannels.net -all

There are 11 domains that have DNS TXT set to v=spf1 +a +mx +ip4:207.55.240.13 +include:relay.mailchannels.net -all. The top 11 records ordered by domain rank are listed below.