We detected something unusual about a recent sign-in to the iCloud account ##email##. To help keep you safe, we required an extra security challenge.
Sign-in details:
Country/region: ##country##
IP address: ##randomip##
Date: ##date##
If this was you, then you can safely ignore this email.
If you're not sure this was you, a malicious user might have your password.
Please review your recent activity and we'll help you take corrective action.