> For the complete documentation index, see [llms.txt](https://help.3sigmacrm.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.3sigmacrm.com/features/integrations/email-verifications.md).

# Email verifications

## Overview

Connect an email verification provider to validate email addresses, improve deliverability, and reduce bounce rates for your campaigns. 3Sigma can verify emails at import, on lead creation, or on-demand before sending campaigns.

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### Why connect Email Verification?

* Reduce bounces and spam complaints
* Improve sender reputation and deliverability
* Clean imported lists automatically
* Save campaign spend by filtering invalid addresses

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### Provider & API key

Sign up with **ValidEmail.net** to get an API key. Use that key in 3Sigma to enable verification.

Sign up at: ValidEmail.net

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### What you’ll configure in 3Sigma

* **API Key** — the key from ValidEmail.net
* **Verification mode** — When creating campaing you can select to verify leads before sending

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