TheHarvester is a tool for gathering e-mail accounts, subdomain names, virtual hosts, open ports/ banners, and employee names from different public sources (search engines, pgp key servers).
This is intended to help Penetration testers in the early stages of the penetration test in order to understand the customer footprint on the Internet.It is also useful for anyone that wants to know what an attacker can see about their organization.
This tool is designed to help the penetration tester on an earlier stage; it is an effective, simple and easy to use. The sources supported are :-
Step 1 :- If you are using Kali Linux, open the terminal and type theharvester
Step 2 :- Then Enter you Target Website that you want to do Email and Domain Scanning.
theharvester -d www.techtrick.in -l 500 -b all -h /root/Desktop/myresult.html