# 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. *** ### 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 *** ### 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 *** ### 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 ### --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.3sigmacrm.com/features/integrations/email-verifications.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.