You can now plug an email-verification service into your storefront customer signup. When a shopper enters an obvious throw-away or invalid email (mailinator, tempmail, gibberish addresses, etc.), they're asked to use a real one before creating an account.
Helps keep your customer list clean — no more orders tied to addresses you can't email later, fewer fake accounts gaming first-order coupons, and saner marketing exports.
Optional. Activate under Settings → Apps → Email Validation; you'll need an EmailListVerify API key. Leave it off and signup behaves exactly as before.