1、廖雪峰教程程式碼會出現此種錯誤：
smtplib.SMTPServerDisconnected: please run connect() first，棄用

2、TypeError: getsockaddrarg: AF_INET6 address must be tuple, not str
伺服器地址型別設定為元組
3、UnicodeEncodeError: ‘utf-8’ codec can’t encode character ‘\udcc9’ in position 0: surrogates not allowed
有些採用讀取附件內容然後再發送附件，讀取附件中中文內容錯誤，utf-8 和 gbk均無效

可用程式程式碼：

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import smtplib
import email.mime.multipart
import email.mime.text
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.application import MIMEApplication

def send_email(smtpHost, sendAddr, password, recipientAddrs, subject=''
 
, content=''):
    msg = email.mime.multipart.MIMEMultipart()
    msg['from'] = sendAddr
    msg['to'] = recipientAddrs
    msg['subject'] = subject
    content = content
    txt = email.mime.text.MIMEText(content, 'plain', 'utf-8')
    msg.attach(txt)


    # 新增附件，傳送D:/軟體/yasuo.rar檔案
    part = MIMEApplication(open('D:/軟體/yasuo.rar'
 
,'rb').read())
    part.add_header('Content-Disposition', 'attachment', filename="yasuo.rar")
    msg.attach(part)

    smtp = smtplib.SMTP()
    smtp.connect(smtpHost, '25')
    smtp.login(sendAddr, password)
    smtp.sendmail(sendAddr, recipientAddrs, str(msg))
    print("傳送成功！")
    smtp.quit()

try:
    subject = 'Python 測試郵件'
    content = '這是一封來自 Python 編寫的測試郵件。'
    send_email('xxsmtp.xxx.com.cn', '[email protected]', '123456', '[email protected]', subject, content)
except Exception as err:
    print(err)