Domains with DNS TXT v=spf1 +a +mx +ip4:156.155.252.20 include:relay.mailchannels.net ~all
There are 322 domains that have DNS TXT set to v=spf1 +a +mx +ip4:156.155.252.20 include:relay.mailchannels.net ~all. The top 50 records ordered by domain rank are listed below.