通过第三方SMTP发送纯文本邮件
#!/usr/bin/python

-- coding: UTF-8 --

import smtplib
from email.mime.text import MIMEText
from email.header import Header

第三方 SMTP 服务

mail_host=“smtp.XXX.com” #设置服务器
mail_user=“XXXX” #用户名
mail_pass=“XXXXXX” #口令

sender = ‘from@runoob.com’
receivers = [‘429240967@qq.com’] # 接收邮件，可设置为你的QQ邮箱或者其他邮箱

message = MIMEText(‘Python 邮件发送测试…’, ‘plain’, ‘utf-8’)
message[‘From’] = Header(“菜鸟教程”, ‘utf-8’)
message[‘To’] = Header(“测试”, ‘utf-8’)

subject = ‘Python SMTP 邮件测试’
message[‘Subject’] = Header(subject, ‘utf-8’)

try:
smtpObj = smtplib.SMTP()
smtpObj.connect(mail_host, 25) # 25 为 SMTP 端口号
smtpObj.login(mail_user,mail_pass)
smtpObj.sendmail(sender, receivers, message.as_string())
print “邮件发送成功”
except smtplib.SMTPException:
print “Error: 无法发送邮件”

其他详见 https://www.runoob.com/python/python-email.html