Attack types
스푸핑 (Spoofing)
Definition
Forging the sender address or display name to appear as a legitimate sender.
For executives (CEO·CISO)
When your domain is spoofed, customers/partners get hurt and the blame lands on your brand; with no defense, anyone can send as you. Commonly missed: many leave DMARC at monitor (p=none) forever — step the policy up to enforcing (p=reject) so it actually blocks.