无法使用 gmail 通过 python 发送电子邮件 - smtplib.SMTPException:服务器不支持 SMTP AUTH 扩展

I just want to send an email in python with an attachment

import smtplib, os
from email.MIMEMultipart import MIMEMultipart
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.Utils import COMMASPACE, formatdate
from email import Encoders

def send_mail(send_from, send_to, subject, text, files=[], server="localhost"):
    assert type(send_to)==list
    assert type(files)==list

    msg = MIMEMultipart()
    msg['From'] = send_from
    msg['To'] = COMMASPACE.join(send_to)
    msg['Date'] = formatdate(localtime=True)
    msg['Subject'] = subject

    msg.attach( MIMEText(text) )

    for f in files:
        part = MIMEBase('application', "octet-stream")
        part.set_payload( open(f,"rb").read() )
        Encoders.encode_base64(part)
        part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(f))
        msg.attach(part)

    smtp = smtplib.SMTP('smtp.gmail.com:587')
    smtp.login('fu@gmail.com','fu')
    smtp.sendmail(send_from, send_to, msg.as_string())
    smtp.close()

ATTACHMENTS = ['/tmp/2013-11-04-test.csv']
send_from=['fu@gmail.com']
send_to=['fu@gmail.com']
subject='adfadfadf'
text = 'adfadfadf'
send_mail(send_from, send_to, subject, text, files=ATTACHMENTS)

我如何进行身份验证?我必须提供用户名和密码.怎么样?

Traceback (most recent call last):
  File "/home/ubuntu/workspace/miliza-devops/classes/utilities.py", line 133, in <module>
    send_mail(send_from, send_to, subject, text, files=ATTACHMENTS)
  File "/home/ubuntu/workspace/miliza-devops/classes/utilities.py", line 124, in send_mail
    smtp.login('fu@gmail.com','fu')
  File "/usr/lib/python2.7/smtplib.py", line 576, in login
    raise SMTPException("SMTP AUTH extension not supported by server.")
smtplib.SMTPException: SMTP AUTH extension not supported by server.

smtp = smtplib.SMTP('smtp.gmail.com:587')
smtp.starttls()
smtp.login('fu@gmail.com', 'fu')

send_from='fu@gmail.com'