参考链接：How do I send mail from a Python script?
使用linux下的sendmail程序来发送邮件，利用popen函数（python docs关于popen函数）可以直接调用linux系统程序，需要指定程序所在的位置。
python代码：
#!/usr/bin/python
# -*- coding: UTF-8 -*-
#Author: Victor Lv
SENDMAIL = "/usr/sbin/sendmail" #sendmail(可执行程序)所在的路径
sender = "sender@example.com"
receivers = ["user1@example.com", "user2@example.com"]
subject = "这是邮件标题"
text = "这是邮件正文。"
#将这些元素组合成一条message
message = """\
From: %s
To: %s
Subject: %s
%s
""" % (sender, ", ".join(receivers), subject, text)
# Send the mail
import os
p = os.popen("%s -t -i" % SENDMAIL, "w")
p.write(message)
status = p.close()
if status:
print "Sendmail exit status", status
python docs中关于发送邮件的其他方法和例子：email: Examples
