from email.MIMEText import MIMEText  from email.MIMEMultipart import MIMEMultipart  import smtplib     mail_host = 'smtp.126.com'  mail_user = 'xx@126.com'  mail_pwd = 'xx'  mail_to = 'xxzhao@gmail.com'        msg = MIMEMultipart()     att = MIMEText(open('d:\\a.txt','rb').read(),'base64','gb2312')  att["Content-Type"] = 'application/octet-stream'  att["Content-Disposition"] = 'attachment;filename="hello.txt"'  msg.attach(att)     message = 'content part'  body = MIMEText(message)  msg.attach(body)  msg['To'] = mail_to  msg['from'] = mail_user  msg['subject'] = 'this is a python test mail'     try:      s = smtplib.SMTP()      s.connect(mail_host)      s.login(mail_user,mail_pwd)         s.sendmail(mail_user,mail_to,msg.as_string())      s.close()         print 'success'  except Exception,e:      print e