python发邮件

# -*- coding:utf-8 -*-

import smtplib,os,sys,string
import mimetypes
from email import Encoders
from email.MIMEBase import MIMEBase
from email.MIMEText import MIMEText
from email.MIMEMultipart import MIMEMultipart
from email.MIMEImage import MIMEImage
import time
import datetime

mail_host="smtp.126.com"
mail_user="用户名"
mail_pass="授权码，不是网页登录密码"
mail_postfix="126.com"

to_list="a@126.com;b@126.com;"
today=datetime.date.today()
oneday=datetime.timedelta(days=1)
yesterday=today-oneday
sub="[数据中心]" + yesterday.strftime('%Y-%m-%d') + "新增账号数据"
content="每日注册用户。请查阅附件。"
attachment_list="m.txt"
######################

def send_mail():
me=mail_user+"<"+mail_user+"@"+mail_postfix+">"
msgRoot = MIMEMultipart()
msg = MIMEText(content,'html',_charset='utf8')
msgRoot['Subject'] = sub
msgRoot['From'] = me
msgRoot['To'] = to_list
inputfilename_list=attachment_list.split(',')
try:
msgRoot.attach(msg)
#for inputfilename in mailattachlist:
for inputfilename in inputfilename_list:
if inputfilename:
basename=os.path.basename(inputfilename)
att = MIMEText(open(inputfilename, 'rb').read(), 'base64', 'utf8')
att["Content-Type"] = 'application/octet-stream'
att["Content-Disposition"] = 'attachment; filename="'+basename+'"'
msgRoot.attach(att)

s = smtplib.SMTP()
#s.set_debuglevel(1)
s.connect(mail_host)

s.login(mail_user,mail_pass)
#s.ehlo()
#s.starttls()
s.sendmail(me, string.splitfields(to_list,";"), msgRoot.as_string())
s.close()
return True
except Exception, e:
print str(e)
print inputfilename
return False

if send_mail():
print 'ok'
else:
print 'false'