Free DMARC Testing Tool

Domain-based Message Authentication, Reporting & Conformance tells receiving servers what to do with emails that fail SPF or DKIM checks. It helps prevent email spoofing and phishing attacks.

p=none

Monitor only, don't take action

p=quarantine

Send suspicious emails to spam

p=reject

Block unauthorized emails entirely

Sender Policy Framework specifies which mail servers are authorized to send email for your domain. It helps prevent spammers from sending messages with forged "From" addresses.

-all

Hard fail: reject unauthorized

~all

Soft fail: accept but mark

include:

Authorize third-party senders

DomainKeys Identified Mail adds a digital signature to your emails, allowing receiving servers to verify the message wasn't altered in transit and truly came from your domain.

selector

Identifies which key to use

p=

Public key for verification

k=rsa

Key type (usually RSA)