ArticleDefensive Security
SPF, DKIM & DMARC Explained (Email Auth 2026)
What SPF, DKIM, and DMARC do, why aligned SPF or DKIM is enough for DMARC, and how to grade your domain with a live checker.
Syed Zada Abrar · 11 min
Published work tagged domain hygiene.
What SPF, DKIM, and DMARC do, why aligned SPF or DKIM is enough for DMARC, and how to grade your domain with a live checker.
Need to read a domain's registration record? Here is what WHOIS and RDAP mean in 2026, which fields matter for hygiene and IR triage, why registrant data is oft…