Domains with DNS TXT v=spf1 ip4:198.187.28.135 +a +mx +ip4:104.219.248.2 +ip4:162.213.255.79 ip4:128.199.137.232 include:spf.improvmx.com ~all
There is 1 domain that have DNS TXT set to v=spf1 ip4:198.187.28.135 +a +mx +ip4:104.219.248.2 +ip4:162.213.255.79 ip4:128.199.137.232 include:spf.improvmx.com ~all.