Email list verification and deliverability testing tool

Take control of your email deliverability and increase open rates and ROI with quick, reliable insights that help you make strategic decisions about your domains, IPs, email list and campaigns.

And receive 200 free credits to get started

Guaranteed 98%+ delivery rate with your verified email list.
Tools to test and optimize email content and inbox placement.
12+ years of email deliverability expertise and success.
And more features to
improve your email marketing

Validate your email list in seconds

Verify a single email address, upload your entire email list, or validate new emails in real-time with the API. Get automated recommendations about list maintenance so you can clean up invalid emails for maximized deliverability.


Analyze and improve email content

Protect your sender reputation and boost deliverability by testing email content before you hit send. Email Insights flags spam words, broken links, blocklists and more so your emails avoid spam folders and reach the inbox.


Test for deliverability before you send

Predict whether your emails will hit the inbox or go straight to the spam folder with Inbox Placement. Test deliverability against major mailbox providers including Google, AOL, Outlook, Yahoo! and more.


Monitor your domain activity

Keep track of how your domain is being used to send emails in real time. Identify issues before they affect your deliverability and prevent unauthorized use of your account to avoid spoofing and phishing attacks.


Learn about blocklist presence in real time

Receive alerts if you appear on a blocklist so you can take steps to get delisted and protect your email deliverability.

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


Straightforward and fair pricing is always our goal. Pay for only what you need—no long term commitments.

How many credits do you need?
Pay as you go
1,000 credits $ 0.01 per credit
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$275 /mo

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$125 /mo

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$0 /mo

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$975 /mo

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