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Verify & Clean Your Lists Before You Send

Verify. Validate.
Deliver with Confidence.

MailInsightX verifies and cleans your mailing and contact lists before you email them — flagging invalid, risky, and disposable addresses so you send to real people, bounce far less, and protect the sender reputation your inbox placement depends on.

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Free plan: 250 Standard and 10 InsightX+ checks every month. No credit card required.

Enterprise Platform
99.9% Accuracy
GDPR Compliant
MailInsightX Email Validation Dashboard

What is MailInsightX?

MailInsightX is an email verification and list-cleaning service. You upload a list (CSV, Excel or plain text) or check a single address, and every address comes back with one clear status before you send to it.

It checks that each address is formatted correctly, that its domain can receive email, and whether it belongs to a disposable (throwaway) provider, a shared role address such as info@, or a random-looking name. With InsightX+ credits it also runs a live Deliverability Analysis that confirms whether the address really exists and flags catch-all domains, without needing to send a test email.

It is built for businesses, professionals, freelancers and developers, and for anyone who needs to verify a single email address or an entire list in bulk. Read the plain-language guide to email verification.

Start free, no credit card required

The free plan includes 250 Standard checks and 10 InsightX+ checks every month.

Every address gets one clear result

  • Valid
  • Invalid Domain (No MX)
  • Disposable
  • Role-Based (Risky)
  • Catch-All (Risky)
  • Greylisted (Temporary)
See what every result means

Trusted by thousands of platforms worldwide

HubSpot
mailchimp
pipedrive
Brevo
SendGrid

Why MailInsightX is the Leading Platform

When compared to traditional validation APIs, the MailInsightX platform offers unmatched accuracy, speed, and deep threat analytics. Here is how we benchmark against the industry standard.

99.9% Accuracy Rate

While the industry average for email verification rests at 96%, the MailInsightX platform achieves 99.9% accuracy. We achieve this with real-time enhanced verification rather than relying on stale cached databases.

Ultra-Fast Processing

MailInsightX processes up to 10,000 emails per minute on bulk uploads, making it one of the fastest verification platforms on the market. Built for scale, so your lists get cleaned instantly.

Actionable Verification Results

Unlike simple tools that just return yes/no, our platform tells you exactly why an email is risky — for example, a decoy trap address, a throwaway inbox, or a domain that accepts everything.

How email verification works in 3 steps

From a raw list to a clean, send-ready file. See the full process.

  1. 1. Add your emails

    Upload a CSV, Excel or text file, or type a single address to check it straight away.

  2. 2. We check every address

    Standard checks cover format, domain, disposable, role-based and random-looking addresses. InsightX+ adds a live check that confirms the address exists.

  3. 3. Download clear results

    Each address gets one status. Your original columns stay intact, with the result and category added next to them, so you know exactly who to send to.

Standard vs InsightX+: which check do you need?

Your plan includes two separate credit pools, so a big cleanup never uses up the deeper checks.

Standard verification

Best for cleaning large lists quickly

  • Checks the address is formatted correctly
  • Checks the domain can receive email
  • Spots disposable, role-based and random-looking addresses
  • Spots parked domains

Fast and low-cost. It cannot confirm that one specific address exists.

InsightX+ verification

Best for signup forms, outreach and risky lists

  • Everything in Standard
  • A live Deliverability Analysis that confirms the address exists
  • Flags catch-all domains that accept any address
  • Spots temporary problems such as a full or briefly unavailable inbox

The developer API always uses InsightX+ credits. How the two pools work.

Platform Analytics

The impact of clean email data

Poor email data hurts your sender reputation and your bottom line. The MailInsightX platform helps you send to the right inboxes and drive unparalleled results.

86%
Bounce Rate
Reduction
99.9%
Verification
Accuracy
2X
Better Inbox
Placement

What You Get

  • Format & Syntax Check
  • Deliverability Analysis
  • Domain Check
  • Catch-All Detection
  • Disposable Email Detection
  • Spam Risk Flags
  • Role-Based Email Detection
  • Deliverability Score

Who MailInsightX is for

Whether you need to verify one email address or an entire list, MailInsightX works for businesses, professionals, freelancers and anyone who wants cleaner contact data.

Businesses of every size

Keep customer, lead and subscriber lists accurate so every campaign, invoice and announcement reaches the right inbox.

Compare plans

Professionals

Recruiters, consultants, real estate agents and other professionals can confirm a contact’s address before sending an important message.

See how it works

Freelancers and solo operators

Verify client and prospect addresses before you reach out. Start on the free plan; no credit card is required.

Create a free account

Anyone verifying an email address

Check a single address in seconds, or upload a file and verify an entire list in bulk.

Single vs. bulk verification

Marketers and newsletter owners

Clean your list before each send to cut bounces and protect your sender reputation.

Email list cleaning guide

Sales and outreach teams

Remove bad and shared addresses before a campaign so your messages reach real people.

How spam traps work

SaaS and product teams

Catch typos and throwaway addresses at signup, before they reach your database.

Add validation to a signup form

Developers

Verify one address per request with the API on paid plans, called from your server.

Choosing an email verification API

What email verification cannot promise

No verification service can guarantee delivery or catch every risky address. Some company domains accept mail for any address, and an inbox can change after it is checked. MailInsightX labels these cases Risky or Catch-All instead of calling them Valid, so you can decide how to send.

Simple platform pricing. No hidden fees.

Choose the plan that fits your needs

Start free and scale your platform usage as you grow.

Free

For trying out the platform

$0/month
free forever
  • 250 Standard Credits / mo
  • 10 InsightX+ Verification / mo
  • Priority Processing Speed
  • Standard Email Support

Starter

For small teams and businesses

$9/month
Billed monthly
  • 9,000 Standard Credits / mo
  • 1,000 InsightX+ Verification / mo
  • Up to 9,000 emails per file
  • Priority Processing Speed
  • Standard Email Support
Most Popular

Business

For growing marketing teams

$39/month
Billed monthly
  • 59,000 Standard Credits / mo
  • 5,000 InsightX+ Verification / mo
  • Up to 59,000 emails per file
  • Priority Processing Speed
  • Catch-All Detection

Enterprise

For large scale platform operations

$199/month
Billed monthly
  • 500,000 Standard Credits / mo
  • 30,000 InsightX+ Verification / mo
  • Up to 500,000 emails per file
  • Custom Integration API
  • Dedicated Account Manager

Email verification guides and comparisons

Plain-language guides to help you pick a tool and keep your list clean.

What is email verification?

How it works, what it checks and what it cannot do.

Top 10 email verification tools

Ten tools compared by strengths, pricing model and best use.

Email verification pricing explained

Credits, subscriptions and the hidden costs to watch for.

Choosing an email verification API

What to look for, plus a safe server-side example.

ZeroBounce alternatives

Seven options compared, and how to test them fairly.

NeverBounce alternatives

Seven options compared, and what to check before you switch.

All guides · Help Center · Developer API · Pricing

Get email deliverability insights in your inbox

Occasional product updates and practical tips on keeping your sender reputation clean. No spam.

Platform Frequently Asked Questions

Direct answers to common queries about the MailInsightX platform.

How accurate is the email validation?
Answer: MailInsightX achieves 99.9% accuracy by combining an email quality analysis, domain validation, and real-time enhanced verification — all without sending an actual email. We check directly with the recipient's mail server to definitively determine if the address exists.
Is the MailInsightX Platform GDPR compliant?
Answer: Yes. The MailInsightX Platform is GDPR compliant. Your uploaded list is encrypted via TLS 1.3 in transit and is used solely to perform verification and return the results to you — never for marketing, and never sold or shared with third parties. You maintain complete ownership of your data at all times, and can request its deletion at any time.
What is a "Catch-all" or "Accept-all" domain?
Answer: Some domains accept mail sent to any address, even ones that don't really exist. We can confirm the domain itself is active, but we can't fully guarantee an individual address is real — so we flag these as "Risky" to help you make informed sending decisions.
How much does MailInsightX cost?
Answer: MailInsightX has a free plan and three paid plans: Starter at $9 a month (9,000 Standard and 1,000 InsightX+ credits), Business at $39 a month (59,000 Standard and 5,000 InsightX+ credits) and Enterprise at $199 a month (500,000 Standard and 30,000 InsightX+ credits). Yearly billing saves 35%. Optional one-time InsightX+ credit packs are also available. See the pricing page for current details.
Is there a free plan?
Answer: Yes. The free plan includes 250 Standard credits and 10 InsightX+ credits every month, and no credit card is required to sign up. API access is available on paid plans only.
What is the difference between Standard and InsightX+ credits?
Answer: Standard credits run fast checks: formatting, whether the domain can receive email, disposable addresses, role-based addresses, random-looking addresses and parked domains. InsightX+ credits include all of that and add a live Deliverability Analysis that confirms whether the address exists and flags catch-all domains. The two credit pools are separate.
Does MailInsightX have an API?
Answer: Yes, on paid plans. POST /v1/verify checks one email address per request and uses one InsightX+ credit. The four API endpoints share a limit of 10 requests per 60 seconds per account, and the key should be used from your server, never from the browser. See the Developer API documentation for details.
Which file types can I upload?
Answer: You can upload CSV, Excel (.xls and .xlsx) and plain text (.txt) files. CSV and Excel files need a column named email, and text files should have one address per line. If a file is larger than your plan allows per upload, it is trimmed to the plan limit rather than rejected.
What can email verification not guarantee?
Answer: No verification service can guarantee that a message will be delivered or find every risky address. Some domains accept mail for any address, and an inbox can change after it has been checked. MailInsightX labels these cases Risky or Catch-All instead of calling them Valid, so you can decide how to send.