Get more out of your email campaigns by delivering emails to valid addresses.

In just one year, 20%-30% of email addresses decay. Mailtester gets rid of those invalid emails from your database with 99% accuracy. Now get free 10 credits. No string attached.

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Is Mailtester right for you?

You want better ROI from your email campaigns and refuse to spend any money on invalid or discarded emails..

You want excellent deliverability. You expect your emails would reach right inboxes every time.

You want an accurate, efficient and secured email list cleaning service.

Get more ROI

Your email campaigns couldn’t drive results if your list is riddled with invalid email addresses. You would have to pay for emails that won’t get delivered ever. Scrub your list with Mailtester, remove those bad emails and watch your ROI increase.

Catch bad emails

Bad emails can creep into your database in many ways— may be a visitor mistyped his email or someone used a non-corporate email to get that awesome lead magent of yours. Catch those irrelevant and invalid emails with Mailtester API and prompt the user to submit only valid ones.

Be in ISPs’ good books.

ISPs keeps tab on how many time you send email to a shady email address. Once you cross a certain threshold your sender reputation takes a hit. Your emails start ending up in spam folders and in the end, you get blacklisted. Use Mailtester to verify your list and enjoy a pristine sender reputation.

Peep into Mailtester toolbox.

Duplicate email remover

Identifies and removes all duplicate contacts.

Spam trap removal

Searches for spam trap emails in your list. Having zero spam traps is a must for your email hygiene.

Risk validator

Removes emails with high-risk keywords or sketchy TLD.

MTA validations

MTA validator checks whether an MTA has a valid MX record.

Domain Validation

Gets rid of any email with inactive, parked or invalid domains.

Complainers verify

Any email that matches with our complainer database gets eliminated.

Syntax verifier

Syntax verifier catches emails containing invalid syntaxes and deletes those.

Real-time bouncing

Removes hard bounces and invalid emails using an SMTP check.

Disposable email checker

Eliminates disposable emails that are used to mask original emails from your list.

Team account

allows multiple users to verify lists while spending from the same credit pool.

Anti-greylisting tech

Anti grey-listing tech verifies even most difficult-to-verify email addresses.

Selectable download

Allows you to download specific segmented results.

Email verification tool that does
everything for you

Bulk email verification

Verifying your lists is now as easy as one-two-three. Just upload your list and let Mailtester algorithm eliminate all the bad emails from your list. With our powerful servers running in the background, you would get a clean list in the blink of an eye.


Mailtester’s easy-to-integrate API allows you to automate the email collection process and prevent bad emails from getting into your list at the same time. Mailtester provides Python, Ruby, C# and PHP API libraries.

Stay connected to the
applications you use daily

Mailtester supports seamless data transfer between Mailtester dashboard and your favourite apps through integrations.


Powerful API for a reliable and automated
email collection process.

Mailtester API is super easy to customize and add to your website and
apps. We offer complete libraries for the most popular languages.

$email = "";
$url = "".$key."&email=".$email;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );
$response = curl_exec($ch);
echo $response;
from emailvalidation import MailtesterSingle E = MailtesterSingle('PUT_YOUR_KEY', '') result = E.control() print result // answer is string 'ok' or 'fail'
- To Upload a Bulk File
client.upload_file("","") path/to/file is optional if file_name file is present in same directory
- To get the status of the last uploaded file
- To get the status of any file with file_id
- Create a client
client ="") Verify Single Email
please visit

Flexible pricing options

Choose the plan that suits you the best

Monthly subscription One time

  • 5,000

    Email Verifications

  • 10,000

    Email Verifications

  • 30,000

    Email Verifications

  • 50,000

    Email Verifications

  • 100,000

    Email Verifications

  • 300,000

    Email Verifications

  • 500,000

    Email Verifications

  • 1,000,000

    Email Verifications

  • 2,500,000

    Email Verifications

  • 5,000,000

    Email Verifications

  • 10,000,000

    Email Verifications


Customer testimonial

Heath Atwood

Email Marketing Expert

When I signed up for Mailtester, I was a bit skeptical at first. How much difference can it make for a relatively smaller company like us? Answer: a lot. We didn’t change our email strategy much still our email open rate has increased like 3-4%. I recommend mailtester.

Caitlynn Potts

Chief Marketing Officer

We were looking for a mail validation service that can handle a large volume of emails and return accurate results. Now Mailtester is our go-to solution.

Joshua Mcnair


We are a small startup and can’t afford to spend hundreds of dollars every month on email verification. Mailtester’s flexible pricing plan works for us. And the service you would get is excellent.

Alex Lee

Sales And Customer Success Manager
AB Real Estate

Efficient, reliable and pocket friendly--- I love Mailtester. I have personally recommended this app to my entreprenuer friends.

Jordy Eubanks


Mailtester is awesome. We have big lists here with us and we keep them clean with Mailtester. It never disappoints.

Anaiah Whitten

Marketing Expert

I am a fan. Mailtester is super accurate and easy to use. I set it up and forget about it. It’s doing its job without any issue.

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