E-commerce
Stop Fraud at Checkout — Validate Every Email Before the Order
Block disposable emails, catch typos, and score risk in real time. Protect your store from fake orders, chargebacks, and wasted transactional emails.
End-to-End Protection
Your complete email quality pipeline
From signup to send, Mailchk protects every stage of your email lifecycle. Block bad addresses, clean your lists, score deliverability, and verify inbox placement.
Block at the Gate
Real-time signup protection
Stop fake, disposable, and scam emails the moment a user hits your signup form. Our API responds in under 50ms — before the page even finishes loading.
Clean Your Lists
Bulk CSV validation & catch-all testing
Already have an email list? Upload it and we'll scrub out the fakes, catch-all addresses, and dead mailboxes. Validate thousands of emails in minutes, not hours.
Score Every Email
Risk & deliverability scoring
Get a 0-100 deliverability score and risk level for every address. Prioritize your safest contacts and flag the risky ones before they damage your sender reputation.
Test Inbox Placement
Know where your emails land
Send a test email and see exactly where it ends up — Primary inbox, Promotions, Spam, or blocked entirely. Test across Gmail, Outlook, and Yahoo before you hit send on your campaign.
Test & Capture
Inspect every email your app sends
Create disposable test inboxes and send your transactional or marketing emails to them. Inspect the full content — HTML rendering, headers, attachments, and plain text — before going live.
Protect your platform at every stage of the email lifecycle
<50ms
Validation Speed
470K+
Scam Domains Blocked
0-100
Risk Score Range
99.9%
Uptime SLA
Live Preview
See Checkout Validation in Action
Watch how mailchk catches disposable emails, typos, and fraud risk before the order is placed.
Checkout
Step 2 of 3 — Contact Information
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The Problem
How Invalid Emails Hurt E-commerce Revenue
From fake orders to missed shipping notifications, bad emails create real revenue problems.
Fake Orders & Chargebacks
Fraudulent accounts with disposable emails place orders that lead to chargebacks and inventory loss.
Bounced Transactional Emails
Order confirmations, shipping updates, and receipts bounce — leaving customers without critical information.
Promo Code Abuse
Bad actors create multiple accounts with throwaway emails to exploit discount codes and first-time buyer offers.
Abandoned Cart Recovery Fails
Cart recovery emails sent to invalid addresses waste resources and hurt your sender reputation with ESPs.
Capabilities
Everything You Need to Protect Your Store
From real-time checkout validation to delivery authentication — one API covers every angle.
Real-Time Checkout Validation
Validate customer emails at checkout in under 50ms. Prevent fake orders before they're placed.
Disposable Email Blocking
Block 470,000+ disposable email domains used for promo abuse, fake accounts, and fraudulent orders.
Domain Typo Detection
Catch typos like yaho.com or gnail.com and suggest corrections — recovering real customers instead of losing them.
Fraud Risk Scoring
Every email gets a 0-100 risk score. Flag high-risk orders for manual review before processing.
Free Email Provider Detection
Identify free email providers vs business domains. Useful for B2B stores requiring corporate emails.
Delivery Authentication
Verify SPF, DKIM, and DMARC records to ensure your order confirmations and shipping updates reach the inbox.
Recommended Products
Email Validation Tools for E-commerce
Choose the right integration for your store — from drop-in widgets to full API access.
Form Guard
Validate emails at checkout with zero backend changes. Drop in a script tag and start blocking fraud.
Explore Form GuardEmail Validation API
Integrate real-time validation into your checkout flow with sub-50ms response times.
Explore APIEmail List Validation
Clean your customer database to improve delivery rates for order confirmations and marketing emails.
Explore List ValidationInbox Placement Testing
Test where your transactional emails land across Gmail, Outlook, and Yahoo.
Learn MoreDon't just take our word for it
See why teams rely on Mailchk to keep their email lists clean
"Mailchk reduced our fake signups by 89%. The API is incredibly fast and the documentation is excellent."
Noel S
CTO, MyBrands Group
"We integrated Mailchk in under an hour. It catches disposable emails that other services miss."
Stephen M
Lead Developer, TRTCompare
"Finally, a solution that actually works. Our email deliverability improved by 40% after implementing Mailchk."
Michael G
Product Manager, Evernu
"The real-time validation is a game changer. No more wasted resources on fake accounts."
Joe S
Founder, Moojority
"Mailchk handles our 100k+ daily validations without breaking a sweat. Incredible performance."
Katie E
DevOps Lead, CVS
"Switched from a competitor and never looked back. Better accuracy, better pricing, better support."
Brendan O
Tech Lead, CardGenr
"Mailchk reduced our fake signups by 89%. The API is incredibly fast and the documentation is excellent."
Noel S
CTO, MyBrands Group
"We integrated Mailchk in under an hour. It catches disposable emails that other services miss."
Stephen M
Lead Developer, TRTCompare
"Finally, a solution that actually works. Our email deliverability improved by 40% after implementing Mailchk."
Michael G
Product Manager, Evernu
"The real-time validation is a game changer. No more wasted resources on fake accounts."
Joe S
Founder, Moojority
"Mailchk handles our 100k+ daily validations without breaking a sweat. Incredible performance."
Katie E
DevOps Lead, CVS
"Switched from a competitor and never looked back. Better accuracy, better pricing, better support."
Brendan O
Tech Lead, CardGenr
Protect Your Store From Fake Orders Today
Get started with 200 free validations. No credit card required.