Gather email addresses and subdomains from public sources
Gather materials from public sources (for pen testers)
theHarvester$ theHarvester -d example.com -b google$ theHarvester -d example.com -b bing$ theHarvester -d example.com -b all$ theHarvester -d example.com -b google -f results.html$ theHarvester -d example.com -b linkedin -l 500