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.

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

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.

Buying email addresses for marketing is a controversial tactic that is but restricted or effectively illegal in the European Union (GDPR) and Canada (CASL) . While it offers a shortcut to reaching new audiences, most experts advise against it because it often leads to high spam complaint rates, damaged domain reputation, and account suspension from major email service providers (ESPs).

Instead of buying "bulk spreadsheets" from unverified brokers, use reputable B2B data platforms that provide real-time verification.