Purchased lists frequently contain "spam traps"—recycled addresses used by ISPs to identify spammers. 3 Reasons Never To Buy Email Lists - Mailchimp
Explicit, informed consent is required. Since contacts on a purchased list did not specifically agree to hear from your organization, using these lists is generally non-compliant.
Prior consent is required, and the law explicitly states that consent does not transfer when a list is sold. 2. Choose a Reputable Data Provider how to buy email addresses for marketing
Request a small sample of the list to test deliverability and relevance before committing to a full purchase. 3. Clean and Verify the List Before Sending
Look for providers like BookYourData or Cognism that offer accuracy guarantees (often 95%+) and regular database updates. Prior consent is required, and the law explicitly
If you choose to proceed with buying a list, follow these best practices to mitigate risk: 1. Evaluate Legal Compliance by Region
Ask the vendor how they collected the data and whether they have records of opt-in consent. your physical postal address
You do not need prior consent to send commercial emails, but you must include a clear opt-out mechanism, your physical postal address, and accurate sender information.