Python中发邮件(明文/SSL/TLS三种方式)

#!/usr/bin/python
#  coding:utf-8 
import smtplib
from email.MIMEText import MIMEText
from email.Utils import formatdate
from email.Header import Header
import sys

#设置默认字符集为UTF8 不然有些时候转码会出问题
default_encoding = 'utf-8'
if sys.getdefaultencoding() != default_encoding:
    reload(sys)
    sys.setdefaultencoding(default_encoding)
 
#发送邮件的相关信息，根据你实际情况填写
smtpHost = 'smtp.126.com'
smtpPort = '25'
sslPort  = '587'
fromMail = '[email protected]'
toMail   = '[email protected]'
username = 'zhangsan'
password = '123456'
  
#邮件标题和内容
subject  = u'[Notice]hello'
body     = u'hello,this is a mail from ' + fromMail

#初始化邮件
encoding = 'utf-8'
mail = MIMEText(body.encode(encoding),'plain',encoding)
mail['Subject'] = Header(subject,encoding)
mail['From'] = fromMail
mail['To'] = toMail
mail['Date'] = formatdate()

try:
    #连接smtp服务器，明文/SSL/TLS三种方式，根据你使用的SMTP支持情况选择一种
    #普通方式，通信过程不加密
    smtp = smtplib.SMTP(smtpHost,smtpPort)
    smtp.ehlo()
    smtp.login(username,password)

    #tls加密方式，通信过程加密，邮件数据安全，使用正常的smtp端口
    #smtp = smtplib.SMTP(smtpHost,smtpPort)
    #smtp.set_debuglevel(True)
    #smtp.ehlo()
    #smtp.starttls()
    #smtp.ehlo()
    #smtp.login(username,password)

    #纯粹的ssl加密方式，通信过程加密，邮件数据安全
    #smtp = smtplib.SMTP_SSL(smtpHost,sslPort)
    #smtp.ehlo()
    #smtp.login(username,password)

    #发送邮件
    smtp.sendmail(fromMail,toMail,mail.as_string())
    smtp.close()
    print 'OK'
except Exception as e:
    print e