Stop Fake Signups.
Bad emails cost you money, reputation, and deliverability. Mailchk catches them at every stage — from signup to inbox.
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
Features
Email verification & deliverability
15+ checks per validation — from disposable detection to deliverability scoring
Disposable Detection
Identify 110,000+ disposable email providers. Updated daily with new threats.
Scam Domain Detection
Block emails from 470,000+ known scam and phishing domains. Synced daily from threat intelligence feeds.
Alias & Tumbling Detection
Detect Gmail dot tricks, plus addressing, and provider aliases. Unmask duplicate signups instantly.
Risk & Deliverability Scoring
Get a 0-100 deliverability score and risk level (low/medium/high/critical) for every email validated.
SPF, DMARC & Blacklist Checks
Verify sender authentication records and check MX servers against DNSBL blacklists in every validation.
Typo & Provider Detection
Catch common domain typos (gmial.com, outlok.com) and identify the email provider for every address.
CSV Bulk Validation
Upload CSV files and validate thousands of emails in minutes, not hours.
Real-time Validation
Lightning-fast API responses in under 50ms. Validate emails as users type with zero lag.
Webhook Notifications
Get instant notifications when suspicious emails are detected in your system.
Free Deliverability Tools
MX lookup, SPF checker, DMARC checker, BIMI checker, blacklist checker, and email health scoring — all free.
The Hidden Cost
Fake Emails Are Hurting Your Business
Every day, businesses lose money, reputation, and opportunities to disposable and fake email addresses.
The Problem
Of signups use fake emails
Nearly a third of all form submissions contain disposable, temporary, or invalid email addresses that will never convert.
Lost to email fraud yearly
Businesses worldwide lose billions annually due to fake accounts, chargebacks, and wasted marketing spend on invalid contacts.
Sender reputation damage
Sending to invalid emails causes hard bounces, which can reduce your deliverability by up to 23% and land you in spam folders.
The Solution
Real-time Validation
Catch fake emails at the point of entry. Our API responds in under 50ms, validating emails before they hit your database.
110,000+ Disposable Domains
Our continuously updated database detects temporary email services like Mailinator, Guerrilla Mail, 10MinuteMail, and thousands more.
MX Record Verification
We verify that the email domain can actually receive messages, catching typos and non-existent domains instantly.
<50ms
Response time
50M+
Emails validated
110,000+
Disposable domains
Price Comparison
Why pay more?
Mailchk delivers the same powerful email validation at a fraction of the cost
Mailchk Price
All features included
| Provider | Price / 1,000 |
|---|---|
MailchkBest Value | $0.40 |
| DeBounce | $1.50 |
| NeverBounce | $5.00 |
| ZeroBounce | $6.00 |
| Hunter.io | $14.90 |
Start saving today with Mailchk's industry-leading pricing
View Pricing PlansPricing
Email Validation Pricing
Start free, scale as you grow. The cheapest email validation API on the market.
Free
For testing & small projects
- 200 validations/month
- Basic API access
- Disposable email detection
- Scam domain detection
- MX record verification
- SPF & DMARC checks
- Typo detection
- Email support
Pro
For growing businesses
- 10,000 validations/month
- Full API access
- Everything in Free, plus:
- CSV bulk email validation
- Risk & deliverability scoring
- Alias & tumbling detection
- Webhook notifications
- Priority support
Business
For large-scale operations
- 50,000 validations/month
- Everything in Pro, plus:
- E2E Email Testing
- Inbox Placement Testing
- Email Watchdog 24/7
- Form Guard Embeddable Widget
- Catch-all detection
- Mailbox existence checking
- 1 team with up to 5 members
Enterprise
For custom requirements
- Unlimited validations*
- Everything in Business, plus:
- SSO
- Custom teams and members
- Custom integrations
- SLA guarantee
- Account manager
- Invoice billing
- Dedicated support
Don't want to subscribe?
Buy credit packs instead. No commitment, no monthly billing. Pay once and use them whenever you need.
1 credit = 1 email validation. Valid for 1 year. Also works as overflow if you have a subscription.
Documentation
Free API for Detecting Disposable Email Addresses
Integrate in minutes with our simple REST API
Endpoint
GET https://api.mailchk.io/v1/check?email={email}Authentication
Authorization: Bearer YOUR_API_KEYResponse
{
"email": "user@example.com",
"valid": true,
"disposable": false,
"scam_domain": false,
"mx_exists": true,
"blacklisted_mx": false,
"free_email": false,
"did_you_mean": "",
"risk_score": "low",
"risk_factors": [],
"email_provider": "Google Workspace",
"deliverability_score": 95,
"spf": "pass",
"dmarc": "pass",
"normalized_email": "user@example.com",
"is_aliased": false,
"alias_type": null
}JavaScript
const res = await fetch(
'https://api.mailchk.io/v1/check?email=test@example.com',
{ headers: { 'Authorization': 'Bearer KEY' } }
);
const data = await res.json();Python
import requests
res = requests.get(
'https://api.mailchk.io/v1/check',
params={'email': 'test@example.com'},
headers={'Authorization': 'Bearer KEY'}
)cURL
curl -X GET \
'https://api.mailchk.io/v1/check?email=test@example.com' \
-H 'Authorization: Bearer YOUR_KEY'Integrations
Works with your stack
Official SDKs and plugins for popular languages and platforms
The Problem
What is a Disposable Email Address?
A disposable email address (DEA) is a temporary, throwaway email that self-destructs after a short period. Users create them in seconds to bypass your signup forms, abuse free trials, or hide their identity.
Popular services like 10 Minute Mail, Guerrilla Mail, and Temp Mail make it trivial to generate fake addresses. These emails can receive your verification messages, but minutes later, the inbox vanishes—leaving you with invalid contacts and wasted resources.
Why it matters
- Higher bounce rates damage your sender reputation with email providers
- Fake accounts skew your analytics and waste support resources
- Trial abuse costs you revenue from users gaming your free tier
of signups on some platforms come from disposable emails
active disposable email providers exist and grow daily
is all it takes for a temporary inbox to disappear
Common disposable email providers we detect:
FAQ
Frequently asked questions
Everything you need to know about Mailchk
Don'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
The complete email pipeline
Stop bad emails before they cost you
From signup to send, Mailchk protects every stage of your email lifecycle. Block bad addresses, clean your lists, score deliverability, and verify inbox placement.
200 free validations every month. No credit card needed.