python3实现SMTP发送邮件详细教程

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

# 第三方 SMTP 服务
mail_host = "smtp.163.com"   # SMTP服务器
mail_user = "***"         # 用户名
mail_pass = "***"        # 授权密码，非登录密码

sender = ***@163.com'  # 发件人邮箱(最好写全, 不然会失败)
receivers = [***@qq.com'] # 接收邮件，可设置为你的QQ邮箱或者其他邮箱

content = '我用Python'
title = '人生苦短' # 邮件主题

def sendEmail():

  message = MIMEText(content, 'plain', 'utf-8') # 内容, 格式, 编码
  message['From'] = "{}".format(sender)
  message['To'] = ",".join(receivers)
  message['Subject'] = title

  try:
    smtpObj = smtplib.SMTP_SSL(mail_host, 465) # 启用SSL发信, 端口一般是465
    smtpObj.login(mail_user, mail_pass) # 登录验证
    smtpObj.sendmail(sender, receivers, message.as_string()) # 发送
    print("mail has been send successfully.")
  except smtplib.SMTPException as e:
    print(e)

def send_email2(SMTP_host, from_account, from_passwd, to_account, subject, content):
  email_client = smtplib.SMTP(SMTP_host)
  email_client.login(from_account, from_passwd)
  # create msg
  msg = MIMEText(content, 'plain', 'utf-8')
  msg['Subject'] = Header(subject, 'utf-8') # subject
  msg['From'] = from_account
  msg['To'] = to_account
  email_client.sendmail(from_account, to_account, msg.as_string())

  email_client.quit()

if __name__ == '__main__':
  sendEmail()
  # receiver = '***'
  # send_email2(mail_host, mail_user, mail_pass, receiver, title, content)