Email comparison
SPF vs DKIM vs DMARC
Compare the three main email authentication controls and understand how alignment affects deliverability.
SPF authorizes senders by IP path. DKIM proves a message was signed with a domain key.
Open SPF / DMARC / DKIM CheckerDMARC tells receivers what to do when SPF or DKIM alignment fails against the visible From domain.
Open SPF / DMARC / DKIM CheckerUse SPF and DKIM When
- You are adding a mail platform or sender.
- A provider asks you to publish SPF or DKIM DNS records.
- You need to verify the DNS pieces exist.
Use DMARC When
- Mail passes SPF but still fails alignment.
- You are moving from monitoring to quarantine or reject.
- You want reporting and policy control for spoofing protection.