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Whether you are planning an integration, have a question about verification results, or need help with your account, send us a note and tell us what you are working on.

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Get in touch

A direct line to MailCheckr.

For product questions, API integration, billing, or account help, reach out at:

support@mailcheckr.app

Please do not include API keys, webhook signing secrets, or passwords in your message.

What can we help with?

API integration

Questions about authentication, verification responses, polling, or signed webhooks.

Verification results

Help understanding a status, check result, or an address that could not be classified conclusively.

Account and credits

Questions about your account, API keys, credit packages, or a checkout.