SPF and DMARC checker.

See where a domain’s email goes, who may send as it, and whether fake email is blocked.

Domain or address

Also scan subdomains, certificates and history (slower)

summary

ownership

dns-records

hosting-and-network

website

security

subdomains

propagation

resolver	a / aaaa	ns	mx

uptime-log

time	result	speed

go-deeper

Report by Binfield · thebinfield.co.uk · Checked from a browser, so it cannot show HTTP status codes, headers or certificate dates.

questions

Good to know

What are SPF, DKIM and DMARC?

SPF lists who may send email for your domain. DKIM signs each email. DMARC says what to do with email that fails, and where to send reports.

Why does it say DKIM was not found?

DKIM names are chosen by your email provider. The checker tries common ones, so a miss does not prove DKIM is off.

What DMARC policy should I use?

Start with p=none to watch, then move to quarantine and reject once reports are clean.

Is the checker free?

Yes. It reads public DNS records and runs in your browser.

$ ls related

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