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