What is a DMARC & SPF Checker?
SPF and DMARC are DNS records that stop strangers from sending email as your domain. Without them, spoofed mail lands in inboxes wearing your name — and increasingly, mailbox providers junk your legitimate mail too.
This checker reads your live DNS, evaluates both records, and explains the policy in force: whether SPF ends in a strict -all, and whether DMARC is enforcing (quarantine/reject) or only monitoring (none).
How to use the DMARC & SPF Checker
- Enter your domain.
- Press Check.
- Read the verdict for SPF and DMARC, with the exact record found and what to change.
Frequently asked questions
What is the difference between SPF and DMARC?
SPF lists which servers may send for your domain. DMARC tells receivers what to do when authentication fails (nothing/quarantine/reject) and where to send reports. You want both.
Is p=none good enough?
It is the right starting point for collecting reports, but it blocks nothing. Move to p=quarantine and then p=reject once reports show legitimate mail passing.
Will strict records break my newsletter or CRM mail?
Only if those senders are not in your SPF/DKIM setup. Add your providers first, watch DMARC reports, then tighten.
What about DKIM?
DKIM signs messages cryptographically and pairs with SPF under DMARC. A dedicated DKIM checker is coming; your mail provider’s docs cover enabling it.