Domains with DNS TXT v=spf1 a mx include:_custspf.one.com include:gmail.com include:_spf.google.com include:googlemail.com include:mail.google.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:_custspf.one.com include:gmail.com include:_spf.google.com include:googlemail.com include:mail.google.com -all.