两个文件
config.py:配置信息
send_msg.py:发送邮件
send_msg.py
#coding=utf-8

import smtplib,config,email,sys
from email.Message import Message

def connect():
    "connect to smtp server and return a smtplib.SMTP instance object"
     server=smtplib.SMTP(config.smtpserver,config.smtpport)
     server.ehlo()
     server.login(config.smtpuser,config.smtppass)
    return server
    
def sendmessage(server,to,subj,content):
    "using server send a email"
     msg = Message()
     msg['Mime-Version']='1.0'
     msg['From']    = config.smtpuser
     msg['To']      = to
     msg['Subject'] = subj
     msg['Date']    = email.Utils.formatdate()          # curr datetime, rfc2822
     msg.set_payload(content)
    try:    
         failed = server.sendmail(config.smtpuser,to,str(msg))   # may also raise exc
    except Exception ,ex:
        print Exception,ex
        print 'Error - send failed'
    else:
        print "send success!"

if __name__=="__main__":
    #frm=raw_input('From? ').strip()
     to=raw_input('To? ').strip()
     subj=raw_input('Subj? ').strip()   
    print 'Type message text, end with line="."'
     text = ''
    while True:
         line = sys.stdin.readline()
        if line == '. ': break
         text += line
     server=connect()
     sendmessage(server,to,subj,text)
config.py
=====================================
smtpserver='mail.xxxx.net'
smtpuser='user@xxx.net'
smtppass='pwd'
smtpport='25' ===================================== 原文地址 http://blog.csdn.net/foyuan/archive/2007/07/26/1709666.aspx

开发笔记：用Python发送邮件 下面是用Python发送email的示例。

#!/usr/bin/python
# -*- coding: utf-8 -*-

import email
import mimetypes
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
from email.MIMEImage import MIMEImage
import smtplib

def sendEmail(authInfo, fromAdd, toAdd, subject, plainText, htmlText):

strFrom = fromAdd
        strTo = ', '.join(toAdd)

server = authInfo.get('server')
        user = authInfo.get('user')
        passwd = authInfo.get('password')

if not (server and user and passwd) :
                print 'incomplete login info, exit now'
                return

# 设定root信息
        msgRoot = MIMEMultipart('related')
        msgRoot['Subject'] = subject
        msgRoot['From'] = strFrom
        msgRoot['To'] = strTo
        msgRoot.preamble = 'This is a multi-part message in MIME format.'

# Encapsulate the plain and HTML versions of the message body in an
        # 'alternative' part, so message agents can decide which they want to display.
        msgAlternative = MIMEMultipart('alternative')
        msgRoot.attach(msgAlternative)

#设定纯文本信息
        msgText = MIMEText(plainText, 'plain', 'utf-8')
        msgAlternative.attach(msgText)

#设定HTML信息
        msgText = MIMEText(htmlText, 'html', 'utf-8')
        msgAlternative.attach(msgText)

#设定内置图片信息
        fp = open('test.jpg', 'rb')
        msgImage = MIMEImage(fp.read())
        fp.close()
        msgImage.add_header('Content-ID', '<image1>')
        msgRoot.attach(msgImage)

#发送邮件
        smtp = smtplib.SMTP()
       #设定调试级别，依情况而定
        smtp.set_debuglevel(1)
        smtp.connect(server)
        smtp.login(user, passwd)
        smtp.sendmail(strFrom, strTo, msgRoot.as_string())
        smtp.quit()
        return

if __name__ == '__main__' :
        authInfo = {}
        authInfo['server'] = 'smtp.somehost.com'
        authInfo['user'] = 'username'
        authInfo['password'] = 'password'
        fromAdd = 'username@somehost.com'
        toAdd = ['someone@somehost.com', 'other@somehost.com']
        subject = '邮件主题'
        plainText = '这里是普通文本'
        htmlText = '<B>HTML文本</B>'
        sendEmail(authInfo, fromAdd, toAdd, subject, plainText, htmlText)

http://blog.donews.com/maverick/archive/2007/04/22/1159142.aspx