Domains with DNS TXT v=spf1 ip4:217.21.72.151 include:mailchannels.net include:relay.mailchannels.net +a +mx ~all
There are 384 domains that have DNS TXT set to v=spf1 ip4:217.21.72.151 include:mailchannels.net include:relay.mailchannels.net +a +mx ~all. The top 50 records ordered by domain rank are listed below.