Knowledge Base

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Glossary

Check out or glossary of 135 common email marketing and deliverability terms.

New User Guide

Just getting started? Find information on specific products as well as account basics.

API Version 2

Access version 2 APIs including Design, Prospect, Validation, and Google Postmaster Tools.

API Version 1

Access the legacy API documentation for Inbox, Reputation, DMARC, Analytics, and Account Services.