Domains with DNS TXT v=spf1 include:mail.fl3xx.us include:spf.smtp2go.com include:spf.us.emailservice.io include:mailgun.org -all
There is 1 domain that have DNS TXT set to v=spf1 include:mail.fl3xx.us include:spf.smtp2go.com include:spf.us.emailservice.io include:mailgun.org -all.