Send email with Django

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/kroger/webapps/quicktestgenerator/quicktestgenerator/sendmail.py", line 2, in <module>
    send_mail(u"test", u"foobar", u"bug@quicktestgenerator.com", [u"pedro.kroger@gmail.com"], fail_silently=False)
  File "/home/kroger/.virtualenvs/quicktestgenerator/lib/python2.7/site-packages/django/core/mail/__init__.py", line 61, in send_mail
    connection=connection).send()
  File "/home/kroger/.virtualenvs/quicktestgenerator/lib/python2.7/site-packages/django/core/mail/message.py", line 251, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/home/kroger/.virtualenvs/quicktestgenerator/lib/python2.7/site-packages/django/core/mail/backends/smtp.py", line 79, in send_messages
    new_conn_created = self.open()
  File "/home/kroger/.virtualenvs/quicktestgenerator/lib/python2.7/site-packages/django/core/mail/backends/smtp.py", line 48, in open
    self.connection.login(self.username, self.password)
  File "/usr/local/lib/python2.7/smtplib.py", line 577, in login
    (code, resp) = self.docmd(encode_cram_md5(resp, user, password))
  File "/usr/local/lib/python2.7/smtplib.py", line 541, in encode_cram_md5
    response = user + " " + hmac.HMAC(password, challenge).hexdigest()
  File "/usr/local/lib/python2.7/hmac.py", line 72, in __init__
    self.outer.update(key.translate(trans_5C))
TypeError: character mapping must return integer, None or unicode