While some gray-market marketers use these lists for unsolicited "cold outreach," they are more frequently associated with: Phishing Campaigns:
Requires a visible physical address, a clear way to opt-out, and strictly forbids misleading subject lines. While it doesn't strictly ban purchased lists, non-compliance carries heavy fines. email list txt yahoo hotmailaol gmail verified
Use an email verification API/service to check: While some gray-market marketers use these lists for