Yes, but 15k emails...
It would have to be a fully automated / AI system that attempted to scrape sites for contact emails, look up domain ownership if possible, and even guess emails (info@<domain>, contact@<domain>, support@<domain>, etc.)
It would have to be a fully automated / AI system that attempted to scrape sites for contact emails, look up domain ownership if possible, and even guess emails (info@<domain>, contact@<domain>, support@<domain>, etc.)