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Address acquisition for mailing lists - the basics

ID: e1d6b6b0-e20b-5aba-b2e6-4ea6626fd86f

STIX ID: report--e1d6b6b0-e20b-5aba-b2e6-4ea6626fd86f

Feed Name: The Spamhaus Project

Date Published: 2022-02-15

Date Updated: 2026-04-30

Author: The Spamhaus Team

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This document provides practical recommendations for website and online forms to ensure transparent user consent and reduce abuse: use voluntary opt-in checkboxes (avoid pre-checked boxes), add CAPTCHA/ReCAPTCHA to prevent automated sign-ups and database poisoning, and employ confirmed opt-in (COI) via email to validate subscriptions.

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