How to fix missing dmarc on Squarespace

Steps for Squarespace

1. In your Squarespace dashboard, go to Settings → Domains (or Website → Domains on older panel versions).
2. If your domain is managed by Squarespace: click on the domain → DNS Settings → scroll to 'Custom Records' → click 'Add Record'. Set Type = TXT, Host = '_dmarc', Data = v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com. Save.
3. If your domain DNS is managed externally (e.g. GoDaddy): log in to that provider and add the TXT record there.
4. Squarespace sends transactional and marketing emails via its own infrastructure. Review Squarespace's official guide on 'Email Authentication' (SPF/DKIM) under Settings → Email to ensure Squarespace emails are authenticated and will pass DMARC alignment.
5. If you use Squarespace Email Campaigns or a connected ESP, authenticate your sender domain in that platform too before setting 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=100

What 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.