Domains with DNS TXT v=spf1 a mx include:za._netblocks.mimecast.com a:fleetmail.cartrack.com a:email.cartrack.com -all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:za._netblocks.mimecast.com a:fleetmail.cartrack.com a:email.cartrack.com -all.