> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://knowledgebase.leadcreator.ai/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Using The Double Opt-In Feature

Learn how to set up the double opt-in feature:
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