Domains with DNS TXT v=spf1 +a +mx +ip4:154.0.166.21 include:relay.mailchannels.net ~all
There are 26 domains that have DNS TXT set to v=spf1 +a +mx +ip4:154.0.166.21 include:relay.mailchannels.net ~all. The top 26 records ordered by domain rank are listed below.