代码如下：
#coding=utf-8
#发送邮件：带附件和正文
import smtplib
from email.mime.text import MIMEText
#from email.header import Header
from email.mime.multipart import MIMEMultipart
import os,time
sender = '[email protected]' #发送邮箱
receiver = '[email protected]' #接收邮箱
smtpserver = 'smtp.163.com' #发送邮箱服务器
pswd ='XCMQESJMOKLWRYBF' #开启stmp的授权码
msg = MIMEMultipart() #创建一个带附件的实例
msg['Subject'] = 'Python3测试邮件'#发送邮件主题
msg['From'] = sender
msg['To'] = receiver
msg.attach(MIMEText('这是python3 邮件发送测试......','plain','utf-8'))#邮件正文内容
#构造附件att，传送目录下的text.txt文件
#单附件发送
att = MIMEText(open('D:\\text.txt','rb').read(),'base64','utf-8')
att['Content-Type'] = 'application/octet-stream'
att['Content-Disposition'] = 'attachment;filename="text.txt"'
msg.attach(att)
'''
#多附件发送
#files = ['text.txt','text - 副本.txt']
#path = 'D:'
files = ['2.jpg','个人-娱乐爱好-电脑桌面.rar']
path = 'D:\\04-个人备份\\个人-娱乐爱好-电脑桌面'
for f in files:
if os.path.isfile(path+'\\'+f):
att = MIMEText(open(path+'\\'+f,'rb').read(),'base64','utf-8')
att['Content-Type'] = 'application/octet-stream'
att.add_header("Content-Disposition", "attachment", filename=("gbk", "", f))
msg.attach(att)'''
try:
'''
#========登录第三方smtp邮箱发送邮件，支持25和465端口========
#smtp port 25
stmp = smtplib.SMTP(smtpserver,25) #smtp port 25
stmp.login(sender,pswd) #使用授权码登录
stmp.sendmail(sender,receiver,msg.as_string()) #发送邮件
stmp.quit()
print('send success by port 25')
#smtp ssl port 465
stmp = smtplib.SMTP_SSL(smtpserver,465) #SMTP_SSL
stmp.login(sender,pswd) #使用授权码登录
stmp.sendmail(sender,receiver,msg.as_string()) #发送邮件
stmp.quit()
print('send success by port 465')'''
#====================登录smtp服务器======================
stmp = smtplib.SMTP()
stmp.connect(smtpserver)
stmp.login(sender,pswd) #使用授权码登录
stmp.sendmail(sender,receiver,msg.as_string()) #发送邮件
stmp.quit()
print('send success')
except smtplib.SMTPException:
print("Error:无法发送邮件")