Email Validation for Shopify | Stop Login Issues and Lost Order Emails

Email Validation in the Shopify Checkout

Incorrect email addresses can lead to failed orders, missed shipping updates, and unnecessary support tickets.
With Address Validation iO, Shopify merchants can now validate customer email addresses directly during checkout for cleaner data, fewer delivery issues, and smoother customer communication.

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What the feature does

The add-on works out of the box, no coding or custom setup is required.

For Shopify Plus merchants:
Simply add the Email Validation Block in your Checkout Customizer and save your changes. Validation will then run automatically.

For non-Plus merchants:
Email Validation runs automatically during the order creation process in the background, without any manual setup or coding.

Activating Email Validation in the Shopify Plus Checkout Customizer.

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Why it matters

• Prevents customers from creating accounts or completing checkouts with invalid email addresses (authentication code fails)

• Reduces failed deliveries and customer service requests

• Keeps your database clean for email and media marketing

• Improves deliverability for newsletters, shipping updates, and post-purchase notifications

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How it works

• Real-time validation against public and official databases

• Detects typos, invalid domains, and unreachable mailboxes

• Automatically tags orders as “valid” or “invalid” for easy filtering and automation inside Shopify

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Availability

Email Validation will be available from November 2025.
Early access is available now for selected merchants. Contact our team if you would like to join the beta phase.

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How to activate it

1. Install Address Validation iO from the Shopify App Store

2. Open the app and enable Email Validation

3. (Shopify Plus) Go to Settings → Checkout → Configurations → Customize and add the Email Validation Block

4. Save your changes. Validation will now automatically run during checkout

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FAQ

Does it slow down the checkout process?
No. Validation runs in the background and does not interrupt the checkout flow, as long as the entered email is correct.

Do I need coding skills?
No. Everything can be enabled visually through the Checkout Customizer or automatically via the app.

Does it work without Shopify Plus?
Yes. Email Validation runs automatically for non-Plus merchants during the order process.

Why should I use email validation?
Keeping your database clean reduces failed deliveries and helps your email and media marketing run effectively.

On what basis is the email validated?
The emails are not only validated against a single database, but rather a combination of domain and mail server checks, blacklists, and proprietary integrations.