Domains with DNS TXT v=spf1 +a +mx +ip4:217.21.73.151 include:relay.mailchannels.net ~all
There are 5,085 domains that have DNS TXT set to v=spf1 +a +mx +ip4:217.21.73.151 include:relay.mailchannels.net ~all. The top 50 records ordered by domain rank are listed below.