Bulk email verification

Increase deliverability and maximize email marketing performance by removing invalid, harmful addresses from your email list with MailerCheck’s bulk email verification tool.
email verification results

Why use MailerCheck’s bulk verifier

MailerCheck’s detailed reports identify safe, risky, and harmful email addresses with 98% accuracy. With 13+ years of industry experience, we know what it takes to maintain great deliverability and reach inboxes.

The most accurate, reliable solution

Upload your email addresses and sit back while your results are generated. Then simply download your cleaned list.

Free duplicate removal

Remove duplicate email addresses without it counting towards the cost of list verification.

Typo and syntax errors

Easily identify email addresses that have been entered erroneously by the subscriber.

Catch-all and role-based emails

See which emails belong to groups and organizations rather than individuals.

Disposable emails

Remove email addresses belonging to temporary mailboxes that are likely to be ignored.

Full mailboxes

Avoid sending to full mailboxes that will reject your emails.

Detailed, downloadable reports

Get a full breakdown of results with easy-to-understand categories and detailed insights into email types.

MailerCheck's customer support team

24/7 Customer support

Whether you need help with getting started, integrating with your ESP, or using advanced features such as the API, our friendly, human customer support team is just a click away.

Credit pricing slider

Flexible credit purchasing options

Purchase as few as 1,000 credits or as many as 5,000,000 at a time. Per-credit costs reduce as you increase purchase volume. Plus, use the Autopay option to automatically top-up your credits when you reach a certain threshold.

Email list

GDPR-compliant data protection

MailerCheck is 100% GDPR compliant so you can upload your subscribers’ emails with confidence, knowing that their data is protected.

What MailerCheck users think

Join 104,207 happy customers worldwide who are already using MailerCheck.

I was introduced to MailerCheck by a friend of mine when I couldn't find a credible solution to help us verify our customer data. We're very conscious of our email marketing and sales email efforts and try to keep a tidy and up-to-date CRM. MailerCheck is a vital part of this process and it's been so easy to onboard and use their solution on a regular basis to ensure high accuracy of email delivery with our campaign.

Amir Jirbandey Head of Growth, Papercup

What I like the most is the fact that it works on credit and there is no need to pay monthly or associate a credit card. It's also quite simple to use that the first time you can already get an idea of the key features to have a validated email list.

Divaldo C. CEO, Consumer Services

Benefits of bulk email verification

Reduces bounce rate

By removing invalid emails from your list.

Enhances deliverability

By maintaining a good standing with ISPs.

Increases ROI

By allowing you to focus on real, engaged subscribers who are more likely to make a purchase.

Prevents blocklisting

By reducing bounces and the risk of sending to spam traps.

Protects domain reputation

By removing harmful or inactive addresses.

Improves engagement rates

By removing inactive subscribers who are unlikely to open your emails.


Our email verification solution is integrated with multiple email platforms. Integrate our email verifier to ensure a clean subscriber list before you hit send.

Frequently Asked Questions

What Is Bulk Email Verification?

Bulk email verification is the process of verifying large lists of email addresses in a single operation with a bulk email checker, rather than individually. This process is commonly used by businesses and organizations that maintain email lists for marketing, communication, or outreach purposes and are looking to remove bad emails that could harm their deliverability.

How can I verify a large list of email addresses at once?

Verifying a large list of email addresses with MailerCheck’s bulk email verifier is easy. First, you’ll need to download or compile your email list as a CSV or TXT file. You can then upload your list in the app and MailerCheck will do the rest. For more information, check out our guide on how to verify an email list. Alternatively, you can verify your list via integration with your email service provider or by uploading your list with the API.

Is MailerCheck free to use?

MailerCheck accounts come with 200 free credits you can use towards email verification, with 1 credit equal to 1 email address verification.

How does free bulk email verification work?

Free bulk email verification services will allow you to upload a list of emails for validation but will most likely come with a limitation to the number of emails that can be verified. For email verification tools, users will often be given some free credits they can use. MailerCheck provides users with 200 free credits when they sign up, with 1 credit equal to 1 email address verification.

How can I improve email deliverability with bulk email verification?

By reducing bounce rates, avoiding spam traps, and enhancing engagement metrics, bulk email verification helps maintain a positive sender reputation and maximize the effectiveness of email marketing campaigns. Following best practices and maintaining good data hygiene further contributes to improved deliverability and engagement by helping you to keep in good standing with ISPs (Internet Service Providers).

How much does email verification cost?

Each verified email address (not including duplicates) costs 1 MailerCheck credit. Pricing goes from $0.01 per credit to $0.001 per credit, depending on the quantity purchased in a single transaction. Check out our pricing.

Ready to clean your email list?

Try MailerCheck for yourself! Sign up and get 200 credits for free, no credit card needed.