Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com include:au._netblocks.mimecast.com include:us._netblocks.mimecast.com -all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com include:au._netblocks.mimecast.com include:us._netblocks.mimecast.com -all.