Domains with DNS TXT v=spf1 include:cust-spf.exacttarget.com include:_spf.google.com mx include:_spf.salesforce.com -all
There is 1 domain that have DNS TXT set to v=spf1 include:cust-spf.exacttarget.com include:_spf.google.com mx include:_spf.salesforce.com -all.