Python发送邮件需要smtplib和email两个模块。也正是由于我们在实际工作中可以导入这些模块，才使得处理工作中的任务变得更加的简单。今天，就来好好学习一下使用Python发送邮件吧。

SMTP是发送邮件的协议，Python内置对SMTP的支持，可以发送纯文本邮件、HTML邮件以及带附件的邮件。

Python对SMTP支持有smtplib和email两个模块，email负责构造邮件，smtplib负责发送邮件。

1.邮件正文是文本的格式

# -*- coding: UTF-8 -*-

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import smtplib
import sys
import csv
import xlrd
from pyExcelerator import *
import os
import xlwt
from xlutils.copy import copy
import pyExcelerator
import datetime
import time

reload(sys)
sys.setdefaultencoding(\"utf-8\")

mailto_list = [\"\"] # 邮件接收方的邮件地址
mail_host = \"smtp.exmail.qq.com\"  # 邮件传送协议服务器
mail_user = \"\" # 邮件发送方的邮箱账号
mail_pass = \"\" # 邮件发送方的邮箱密码

def send_mail(to_list, sub, content):
  me = \"天才白痴梦\"+\"<\"+mail_user+\">\"
  msg = MIMEText(content, _subtype=\'plain\', _charset=\'utf-8\')
  msg[\'Subject\'] = sub  # 邮件主题
  msg[\'From\'] = me
  msg[\'To\'] = \";\".join(to_list)
  try:
    server = smtplib.SMTP()
    server.connect(mail_host)
    server.login(mail_user, mail_pass)
    server.sendmail(me, to_list, msg.as_string())
    server.close()
    return True
  except Exception, e:
    print str(e)
    return False

if __name__ == \'__main__\':
  sub = \"天才白痴梦\"
  content = \'...\'
  if send_mail(mailto_list, sub, content):
    print \"发送成功\"
  else:
    print \"发送失败\"

2.邮件正文是表格的格式：由于是表格，所以我们选择HTML来实现表格的功能，邮件上面显示的就是HTML实现的内容了。

# -*- coding: UTF-8 -*-

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import smtplib
import sys
import csv
import xlrd
from pyExcelerator import *
import os
import xlwt
from xlutils.copy import copy
import pyExcelerator
import datetime
import time

reload(sys)
sys.setdefaultencoding(\"utf-8\")

mailto_list = [\"\"] # 邮件接收方的邮件地址
mail_host = \"smtp.exmail.qq.com\"  # 邮件传送协议服务器
mail_user = \"\" # 邮件发送方的邮箱账号
mail_pass = \"\" # 邮件发送方的邮箱密码

def send_mail(to_list, sub, content):
  me = \"天才白痴梦\"+\"<\"+mail_user+\">\"
  # 和上面的代码不同的就是，这里我们选择的是html 的格式
  msg = MIMEText(content, _subtype=\'html\', _charset=\'utf-8\')
  msg[\'Subject\'] = sub  # 邮件主题
  msg[\'From\'] = me
  msg[\'To\'] = \";\".join(to_list)
  try:
    server = smtplib.SMTP()
    server.connect(mail_host)
    server.login(mail_user, mail_pass)
    server.sendmail(me, to_list, msg.as_string())
    server.close()
    return True
  except Exception, e:
    print str(e)
    return False

if __name__ == \'__main__\':
  sub = \"天才白痴梦\"
  html = \'\'
  if send_mail(mailto_list, sub, html):
    print \"发送成功\"
  else:
    print \"发送失败\"

3.邮件正文是图片的格式：要把图片嵌入到邮件正文中，我们只需按照发送附件的方式，先把邮件作为附件添加进去，然后，在HTML中通过引用src=\”cid:0\”就可以把附件作为图片嵌入了。如果有多个图片，给它们依次编号，然后引用不同的cid:x即可。

def send_mail(to_list, sub, content):
  me = \"天才白痴梦\"+\"<\"+mail_user+\">\"

  msg = MIMEMultipart()
  msg[\'Subject\'] = sub  # 邮件主题
  msg[\'From\'] = me
  msg[\'To\'] = \";\".join(to_list)

  txt = MIMEText(\"天才白痴梦\", _subtype=\'plain\', _charset=\'utf8\')
  msg.attach(txt)

  # ：黑体 ：斜体
  msgText = MIMEText(\'Some HTML text and an image.good!\', \'html\', \'utf-8\')
  msg.attach(msgText)

  file1 = \"F:\\\\1.jpg\"
  image = MIMEImage(open(file1, \'rb\').read())
  image.add_header(\'Content-ID\', \'\')
  msg.attach(image)

  try:
    server = smtplib.SMTP()
    server.connect(mail_host)
    server.login(mail_user, mail_pass)
    server.sendmail(me, to_list, msg.as_string())
    server.close()
    return True
  except Exception, e:
    print str(e)
    return False

if __name__ == \'__main__\':
  sub = \"天才白痴梦\"
  html = \'\'
  if send_mail(mailto_list, sub, html):
    print \"发送成功\"
  else:
    print \"发送失败\"

def send_mail(to_list, sub, content):
  me = \"天才白痴梦\"+\"<\"+mail_user+\">\"

  msg = MIMEMultipart()
  msg[\'Subject\'] = sub  # 邮件主题
  msg[\'From\'] = me
  msg[\'To\'] = \";\".join(to_list)

  txt = MIMEText(\"天才白痴梦\", _subtype=\'plain\', _charset=\'utf8\')
  msg.attach(txt)

  # # ：黑体 ：斜体
  # msgText = MIMEText(\'Some HTML text and an image.good!\', \'html\', \'utf-8\')
  # msg.attach(msgText)
  #
  # file1 = \"F:\\\\1.jpg\"
  # image = MIMEImage(open(file1, \'rb\').read())
  # image.add_header(\'Content-ID\', \'\')
  # msg.attach(image)

  att = MIMEText(open(\'F:\\\\1.jpg\', \'rb\').read(), \'base64\', \'utf-8\')
  att[\"Content-Type\"] = \'application/octet-stream\'
  att[\"Content-Disposition\"] = \'attachment; filename=\"1.jpg\"\'
  msg.attach(att)

  try:
    server = smtplib.SMTP()
    server.connect(mail_host)
    server.login(mail_user, mail_pass)
    server.sendmail(me, to_list, msg.as_string())
    server.close()
    return True
  except Exception, e:
    print str(e)
    return False

smtp_server = \'smtp.qq.com\'
smtp_port = 25  # 默认端口号为25
server = smtplib.SMTP(smtp_server, smtp_port)
server.starttls()
# 剩下的代码和前面的一模一样:
server.set_debuglevel(1)   # 打印出和SMTP服务器交互的所有信息