python 实现非验证发送邮件

#!/bin/env python
#_*_ encoding:utf-8 _*_
import smtplib
import string
from email.mime.text import MIMEText
from email.header import Header
from email.mime.multipart import MIMEMultipart
from email.utils import COMMASPACE,formatdate

HOST = "server.com"
subject = 'hello'
TO = 'to@to.com'
FROM='from@from.com'
text = 'hai'

msg = MIMEMultipart()
msg['From'] = FROM
msg['Subject'] = subject
msg['Date'] = formatdate(localtime=True)
msg.attach(MIMEText(text))

server = smtplib.SMTP()
server.connect(HOST,'25')

server.sendmail(FROM,TO,msg.as_string())
server.quit()