python发邮件报错SMTP AUTH extension not supported by server."

在login(username,password)之前添加
smtp.ehlo()
smtp.starttls()

d ={'smtp_server': '','smtp_email': '','smtp_helo': '','smtp_port': '25',}
e = Email(d)
e.smtp = smtplib.SMTP(e.smtp_server,e.smtp_port)
e.smtp.ehlo()
e.smtp.starttls() 
e.smtp.helo(e.smtp_helo)
e.smtp.set_debuglevel(1)
e.smtp.login('username','password')