MailShield – Email Validator
Stop bad emails at checkout before they become bad orders.
What it does
Bad email addresses cause failed deliveries, chargebacks, fake accounts, and support tickets. MailShield checks every email at checkout and blocks the risky ones before the order is placed — rejecting disposable domains, enforcing your blocklist, and catching typos so genuine customers can correct them. Risky orders that slip through get scored, tagged, and flagged for review before you ship.
Features
Block disposable emails
Rejects temporary and throwaway email domains at checkout, before the order is ever placed.
Typo detection & "Did you mean?"
Catches common email typos and suggests the correct domain so real customers can fix it instantly.
Custom domain blocklist
Enforce your own list of blocked domains on top of the built-in disposable-email database.
Risk tags & order alerts
Scores each order after checkout, tags suspicious ones, and emails you when a risky order comes through.
Protect your checkout in minutes
Free plan available — works on every Shopify plan, no code required.