Koltrix
Deliverability
DMARC for subdomains: sp=, np= and domains you forgot
Attackers love subdomains you never configured. How sp= and the new np= tag cover them, how policy discovery works, and when to publish per-subdomain records.
4 min read
Attackers love subdomains you never configured. How sp= and the new np= tag cover them, how policy discovery works, and when to publish per-subdomain records.
4 min read