Domains with DNS TXT v=spf1 ip4:66.180.33.205 include:smtp2go.com include:amazonses.com include:spf.improvmx.com ~all
There is 1 domain that have DNS TXT set to v=spf1 ip4:66.180.33.205 include:smtp2go.com include:amazonses.com include:spf.improvmx.com ~all.