DMARC for E-commerce | DMARC Creator

Your customers expect order confirmations, shipping notifications, and password reset emails to arrive instantly and look legitimate. When those messages fail authentication checks or get spoofed by someone impersonating your brand, you lose sales and customer trust. DMARC is the protocol that prevents both of those problems.

If you run an online store on Shopify, WooCommerce, Squarespace, BigCommerce, or any other platform, this guide explains how DMARC protects your transactional email and walks you through setting it up.

Why E-commerce Email Is a High-Value Target

E-commerce email carries more weight than most business email. A typical online store sends order confirmations, shipping updates, delivery notifications, password resets, abandoned cart reminders, and promotional campaigns. Every one of these messages is tied to money or account access.

That makes e-commerce domains attractive to spoofers. A phishing email that looks like a shipping notification from your store can trick customers into clicking malicious links, entering payment details, or handing over account credentials. Without DMARC, there is nothing stopping someone from sending email that appears to come from your domain. Learn more about how DMARC prevents email spoofing for your brand.

Beyond phishing protection, DMARC improves your legitimate email delivery. Mailbox providers like Gmail and Yahoo give preferential treatment to domains with strong authentication. If your order confirmations are landing in spam, a missing or weak DMARC record might be part of the reason. Our guide on DMARC and email deliverability explains this relationship in detail.

The customer trust factor

When a customer receives a spoofed email that appears to come from your store, they blame your brand, not the attacker. Even if only a small number of customers are affected, the support tickets and social media complaints create real damage. DMARC prevents this by telling mail servers to reject unauthorized messages.

The Multi-Sender Problem in E-commerce

Most e-commerce businesses do not send email from just one source. A typical setup might look like this:

Shopify or WooCommerce handles order confirmations and shipping notifications
Klaviyo, Mailchimp, or Omnisend sends marketing campaigns and abandoned cart emails
Zendesk, Freshdesk, or Help Scout handles customer support replies
Stripe or PayPal sends payment receipts
Your own application sends password resets and account notifications

Each of these services sends email as your domain, and each one needs proper SPF and DKIM configuration. If even one sender is not authenticated, those messages will fail DMARC checks once you enforce your policy.

This is the core challenge for e-commerce DMARC setup: identifying every service that sends email on your behalf and making sure each one is authenticated before you start blocking unauthorized senders.

Inventory your sending services

Before creating your DMARC record, list every platform and tool that sends email from your domain. Check your e-commerce platform, marketing tools, support desk, payment processors, and any custom applications. Each one will need SPF and DKIM configured.

Check platform-specific requirements

Shopify requires you to verify your domain and add specific DNS records. WooCommerce stores using a plugin like WP Mail SMTP may route through a third-party sender. BigCommerce has its own domain verification process. Each platform is different.

Authenticate your marketing tools

Email marketing platforms like Klaviyo and Mailchimp require domain authentication through SPF includes and DKIM keys. These are usually found in the platform's sender authentication or domain verification settings.

Do not forget support and payments

Customer support platforms and payment processors often send email as your domain. Zendesk, Freshdesk, Stripe, and similar services all have domain authentication settings that need to be configured.

Setting Up SPF and DKIM for Your Store

DMARC relies on SPF and DKIM to verify that messages are legitimate. Both need to be in place before DMARC can work.

SPF: Authorizing Your Senders

Your SPF record lists every server and service authorized to send email for your domain. For an e-commerce store with multiple senders, your SPF record might include several services. Build your SPF record at spfcreator.com and make sure every sending service is included.

Be aware of the ten DNS lookup limit in SPF. E-commerce stores with many sending services can hit this limit quickly. If your SPF record has too many include statements, consider consolidating senders or using an SPF flattening approach.

DKIM: Signing Your Messages

Each sending service should be configured to sign messages with DKIM. Most e-commerce platforms and marketing tools provide DKIM keys that you publish as DNS records. Generate and manage your DKIM records at dkimcreator.com.

Shopify, for example, requires you to add CNAME records for DKIM verification. Klaviyo asks you to add a DKIM TXT record. Each service has its own process, but the goal is the same: every message sent on your behalf gets a valid cryptographic signature.

Do not skip DKIM for any sender. SPF alone is not reliable enough for e-commerce because forwarded emails break SPF alignment. DKIM survives forwarding, making it the more dependable authentication method for messages that might pass through multiple servers.

Creating Your DMARC Record

With SPF and DKIM configured for all your sending services, you are ready to create your DMARC record. Start with a monitoring-only policy so you can verify everything is working before you enforce anything.

Generate your DMARC record

Use the generator below. Set the policy to none and include a reporting address so you receive aggregate reports about who is sending email as your domain.

Add the record to your DNS

Create a TXT record at _dmarc.yourstore.com with the generated value. If your DNS is managed by your domain registrar, log in to their panel and add the record there.

Verify the record is published

Check your DMARC record at dmarcrecordchecker.com to confirm it is live and properly formatted.

Review reports for two to four weeks

Aggregate reports will show every IP and service sending email as your domain. Confirm that Shopify, your marketing tools, support desk, and payment processors all show passing results. Investigate any failures.

Fix any authentication gaps

If a legitimate sender is failing, go back to that service's settings and verify SPF and DKIM are configured. Common issues include missing DNS records, typos in record values, and services that changed their sending infrastructure without notice.

Move to enforcement gradually

Once everything passes, move to p=quarantine at a low percentage, then increase. Eventually move to p=reject for full protection. This gradual approach ensures no legitimate order emails are blocked during the transition.

Platform-Specific Considerations

Shopify

Shopify sends order notifications and some marketing emails from its own infrastructure. You need to verify your sender domain in Shopify's settings under Settings > Notifications > Sender email. Shopify will prompt you to add CNAME records for authentication. Without this step, Shopify emails will either come from a Shopify address instead of your domain or fail authentication checks. For a detailed walkthrough, see our DMARC for Shopify guide.

WooCommerce

WooCommerce runs on WordPress and typically sends email through your hosting server's PHP mail function, which often has poor deliverability. Most WooCommerce stores use a plugin like WP Mail SMTP to route email through a dedicated service such as SendGrid, Mailgun, or Amazon SES. Make sure whichever service you use is included in your SPF record and has DKIM configured.

Squarespace and BigCommerce

Both platforms handle email sending for order notifications through their own systems. Check each platform's documentation for domain verification steps. Both will require DNS records to authenticate email sent on your behalf.

Track every sender on your domain

Monitor SPF, DKIM, DMARC, and MX records daily. Catch authentication issues before they affect your customers.

Start Monitoring

Protecting Your Brand During Peak Seasons

E-commerce phishing spikes during Black Friday, Cyber Monday, holiday seasons, and major sales events. Attackers know that customers are expecting a flood of order confirmations and shipping notifications, which makes them less likely to scrutinize each email carefully.

Having DMARC at p=reject before these peak periods means spoofed emails are blocked outright. Customers only receive email that actually comes from your authenticated senders. If you are deciding between quarantine and reject, our quarantine vs. reject comparison explains the tradeoffs. Set up DMARC well before your next major sale so you have time to monitor, fix issues, and reach full enforcement.

If you also own variations of your domain name (common misspellings, different TLDs), publish p=reject DMARC records on those too. Spoofers often use lookalike domains to target your customers.

Monitor Your DMARC Record

You've created your DMARC record — now make sure it keeps working. The Email Deliverability Suite watches your SPF, DKIM, DMARC, and MX records daily and alerts you when something breaks.

Never miss a DMARC issue

Monitor your SPF, DKIM, DMARC and MX records daily. Get alerts when something breaks.