How to fix missing dmarc on Shopify Plus
Add a DMARC DNS TXT record at _dmarc.yourdomain.com to protect your domain from email spoofing and phishing.
Steps for Shopify Plus
- Same DNS process as Shopify above — DMARC is a DNS-level record independent of Shopify Plus features.
- Shopify Plus merchants often use custom transactional email platforms (Klaviyo, Bronto, etc.): before enforcing DMARC, check each sending platform's documentation to ensure SPF and DKIM are configured for your domain in that platform.
- If you use Shopify's built-in email (Shopify Email): authenticate your sender domain under Settings → Email Marketing → Sender Domain and follow the SPF/DKIM setup steps so Shopify Email passes DMARC alignment before you set p=reject.
; DNS TXT record — hostname: _dmarc.yourdomain.com
; Phase 1 – monitoring only (safe starting point)
v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com
; Phase 2 – enforcement (after confirming all legitimate mail passes)
v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; pct=100
; Phase 3 – strictest (recommended long-term goal)
v=DMARC1; p=reject; rua=mailto:dmarc@yourdomain.com; pct=100What is missing dmarc?
DMARC (Domain-based Message Authentication, Reporting & Conformance) is a free email authentication standard you publish as a DNS record. It tells the world's email providers — Gmail, Outlook, Yahoo, and others — what to do when someone sends an email that pretends to be from your domain but fails authentication checks. Without a DMARC record, anyone can forge your store's "From" address and send convincing phishing or spam emails that appear to come from you. The record lives at a specific DNS address (_dmarc.yourdomain.com) and takes effect within 24–48 hours of being added.
Without DMARC, criminals can send emails that look exactly like they came from your store — order confirmations, password resets, or fake promotions — tricking your customers into handing over payment details or passwords. This directly damages customer trust, can result in your domain being blacklisted by mail providers (destroying your legitimate email deliverability), and exposes you to legal and reputational liability under consumer-protection and data-privacy laws. OWASP classifies this as a Security Misconfiguration (A05:2021) — one of the most common and impactful categories of web security failures. Fixing it is free and takes under 30 minutes yet closes a major attack vector immediately.
See the complete Missing dmarc guide for every platform and the full background.
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