6 Best and Reliable Email Verification Tools of 2024

BySuryanarayan Pal


Linkedin logo
Twitter logo
copy link
Facebook logo
Whatsapp logo
Pinterest logo
mail logo

Email verification and validation play a vital role in your email campaign's success. Validating and verifying the recipients' email addresses before kicking off your email campaign helps improve the campaign performance.

This guide will discuss email verification and validation, why it is done, and some trustworthy best email verification tools you can use to carry out email verifications, along with their unique features and capabilities.

Table of contents

What is email verification?

Email verification ensures whether the recipient's mailbox is active and accepts emails. It also identifies different email address discrepancies and possible spam traps before it gets flagged by Internet Service Providers (ISPs) or mailbox providers, which can cause severe damage to your reputation.

In other words, email verification enhances deliverability by cleaning up your emails and helps deliver messages to your target audience.

When should you use email verification service?

There are different reasons why an email address may turn invalid or stop working. Sometimes it may be due to behavioral factors like a person changing their email address, and sometimes it is because of certain technical glitches.

Below are a few reasons why email addresses might become invalid, and hence verifying your email lists before sending out an email campaign becomes essential.

  • When the recipient changes their email service/provider.
  • When the recipient changes their email ID within the same email service provider.
  • When the recipient switches positions within a company.
  • When the recipient changes jobs.
  • When the domain is dead, it's a familiar and technical reason to verify the email.

Why use an email verification service?

The major benefits of using an email verification service are as follows.

• Lowers bounce rate

Prevent bounces and preserve your sender's reputation. An email verification tool will remove non-existing email addresses misspelled email addresses, thereby lowering bounce rate and protecting your IP reputation.

• Scrubs your email database

Enhance your email list with an email scrub. By scrubbing your list, you will be able to collect valuable data about your leads and segment the list based on the data. This will help improve your conversion rates.

• Analyzes your email headers

Email verification tools will analyze your email headers to ensure your mail server is set up and configured correctly, all to make sure that your emails reach their recipients.

• Monitors your IP and domain

It's essential to check your IP and domain reputation and be notified when they are listed on a blacklist. You'll be provided alerts should your IP or domain show up on a list.

To choose a good email verification and validation tool, you need to understand the basics of email verification and the different features you should look for in a tool. Let's start with understanding how email verification works.

Maximize your email performance with our free ebook

Optimize the right email metrics for higher ROI

How is email verification done?

Though many of us use email verifying tools, most don't understand how email verification works. Below are a few steps that explain how email verifiers work and their process.

• Syntax check

It helps ensure whether the email address is correct, checks spelling, commas, spaces, special characters, and whether the domain extensions are in the right place.

• Domain check

It checks whether the domain name used in the email address exists and is registered and whether it is working correctly on its hosted domain.

• Email ping

Email Ping is the technical process, which pings an EHLO message to the exact email address and then waits for the server's response. If there is a response, it indicates that the email address is correct, exists, and the server is active.

What should you look for in good email verification and validation tool?

Now that you understand the basics of how email verification works, you can start looking out for a verification and email validation tool that uses these processes to perform testing. As you sift through various tools, here is the list of features you need to look at before making your final choice.

Criteria Description
Online tool Ensure the verifier operates as an online email verification tool, accessible via Software-as-a-Service (SaaS), allowing access from any device at any time.
Scalability Verify the verifier's capability to handle both single email addresses and large email lists, with the ability to process them instantly or with minimal delay.
Personal and Corporate Confirm whether the verifier can accurately verify both personal and corporate/business email addresses.
Different Verification Check if the verifier utilizes various validation mechanisms such as email server ping, domain check, and syntax check to ensure thorough verification.
All-in-one/Connectivity Ensure integration or connectivity with various tools including email list management, email sending, email generation, and other relevant tools.

6 reliable email verification tools

We at Mailmodo went through many popular and not-so-popular email validation and verification tools and rated them based on the above features and benefits. Here are some of the useful email verification tools that we recommend.

1. Zero Bounce

Zero Bounce is one of the leading and popular online email validation services that ensure the companies sending high volume and complex emails lead to [better email deliverability. The email verifier tool can eradicate bounces, remove invalid email addresses, verify key recipient demographics, and confirm IP addresses.


Some of this tool's key and unique features include disposable email detection, syntax check, bulk email verification, single email verification, domain check, catch-all server detection, and spam detection.

  • This tool provides inbox placement tester and other deliverability tools, which are prevalent for testing the leading email providers for spam/inbox placement and mail server tester.

  • It protects the senders' reputation for email marketing and detects and eradicates known spam and abuse trap emails, toxic, temporary addresses, and catch-all domains.

  • It provides information about the subscribers and boosts deliverability.

  • This tool also includes API integrations, and it is an effortless and fastest tool to validate emails.

Pricing (Offers free trial & freemium benefits)

The basic plan starts at $15 per month, and they also have a freemium version. Freemium works based on credit score.

2. Bouncer

Bouncer decreases bounce rate, protects the sender's reputation, and enhances your deliverability by not allowing unknown, risky, or a single email address to enter into the lists of your email. Bouncer is user-friendly and helps deliver messages to your audience with promptness and ease.


  • Some of the key unique features include disposable email detection, syntax check, bulk email verification, single email verification, domain check, and catch-all server detection.

  • Bouncer's easy-to-integrate and ultrafast email verification APIs provide various advantages that include countless possibilities to validate your emails.

  • You can also use bulk email verification or verify the emails in real-time in batches or at once.

Pricing (Offers freemium benefits)

It serves based on the pay-as-you-go model. It costs about $0.0025 per email. If you want to take a trial run, you could use the free 1000 credits to play around with the tool.

3. Emailable

Emailable is an affordable, fast, and accurate email verification tool that removes bad bounces and emails. TheChecker can help you to increase the ROI of your email campaign and help you to stop being blocked by Spamhaus and other anti-spam organizations.


Some unique features include a quick email checker, filetype compatibility, anti-greylisting technology, misspelled domain detection, risk validation, customized exports, and more.

  • This tool claims it has the latest anti-greylisting technology and offers you the most accurate email validation results.

  • It can also check addresses for syntax errors.

Pricing (Offers free trial & freemium benefits)

It serves based on the pay-as-you-go model. It costs about $0.0019 per email. You can also sign up for a free trial and validate up to 100 emails for free.

4. Hunter Email Verifier

Email Verifier from Hunter is a handy tool that every email marketer should have since it verifies email addresses from the list, ensuring all the emails will be delivered to the correct recipients. Hunter Email Verifier is a user-friendly email verifier where you paste the email address you'd like to verify, and you'll get a verification score in less than a few seconds.


  • A fast and accurate email verification process that returns the results in seconds increases your chances of conversions.

  • Bulk email verification with detailed reporting.

  • Email verification API that you can reuse for your projects.

Pricing (Offers free version suitable for small businesses)

Price varies on the amount of Hunter requests available each month. If you'd like to try the tool, a free version provides 25 searches and 50 verifications per month. The "Growth" option offers 2,500 searches and 5,000 verification at 99 Euros per month for established businesses with more extensive email lists.

5. DeBounce

DeBounce helps get rid of threatening emails and protects your domain. You can also deactivate emails from your list. Every email marketer who sends out email marketing campaigns can enjoy DeBounce.


Some unique features include disposable email detection, syntax check, bulk email verification, single email verification, domain check, catch-all server detection, and spam detection.

You can use the API to instantly verify email addresses on your platform with this tool.

  • This tool has intelligent spam-trap indicators which remove all records of spam.

Pricing (Offers free trial & freemium benefits)

It serves based on the pay-as-you-go model. The basic plan starts at $10.00, with which you will be able to verify up to 5000 emails. You can also sign up for a free trial and get 100 credits for free.

6. Clearout is one of the 98%+ accuracy email validation and verification tools capable of carrying out more than 20+ refined validation checks. You can verify more than 15 million email IDs per day to remove invalid and temporary addresses, spam traps, and abuses.


  • Some of the unique features of Clearout include WordPress plugin availability, Google Sheets Add-ons availability, secure data, fully compliant, secure data transmission, real-time verification, and more.

  • Bulk validation, real-time validation, and quick validation are a few ways in which you can verify your emails.

  • It also works with top CRMs and Email Service Providers (ESPs).

Pricing (Offers free trial & freemium benefits)

Pricing for Clearout works based on the credit score. One credit is equal to 1 email. You can buy 5000 credits for $25. You can also create a free account and get 100 credits for free to get started.


I hope the above list of email verification and validation tools has provided you with a clear understanding of which tools better suit your needs. Once you have picked the right email verification tool to validate your email lists and used them in maintaining list hygiene, your delivery, and open rates will improve.

If you want to improve your email conversion rate, you can start sending interactive AMP emails to your prospects and customers.

AMP emails can bring interactive forms, carts, calendars, and engagement inside your prospects’ emails. To send AMP emails, you can check out Mailmodo, which we have designed to help you create and send actionable and interactive emails that power unique email experiences.

What should you do next?

Thanks for reading till the end. Here are 3 ways we can help you grow your business:


Get smarter with our email resources

Explore our email marketing guides, ebooks and other resources to master email marketing.


Do better email marketing with Mailmodo

Send app-like interactive emails with forms, carts, calendars, games, etc. to boost email ROI.


Talk to an email expert

Get a 30-min. free email consultation with a Mailmodo expert to optimize your email marketing.

Was this post useful?

Get 3X conversions
with interactive emails


Create & send interactive emails without coding


Put revenue on auto-pilot with pre-built journeys


Save time with AI-powered email content creation

1000+ businesses grew with Mailmodo, including