python自带了两个模块smtplib和email用于发送邮件。smtplib模块主要负责发送邮件，它对smtp协议进行了简单的封装。email模块主要负责邮件的构造。
email包下有三个模块：MIMEText,MIMEImage,MIMEMultipart
import smtplib
from email.header import Header
from email.mime.text import MIMEText
sender = '888888@qq.com' # 发送使用的邮箱
receivers = ['888888@qq.com'] # 收件人，可以是多个任意邮箱
message = MIMEText('这里是正文！', 'plain', 'utf-8')
message['From'] = Header("发送者", 'utf-8') # 发送者
message['To'] = Header("接收者", 'utf-8') # 接收者
subject = '这里是主题！'
message['Subject'] = Header(subject, 'utf-8')
try:
# qq邮箱服务器主机
# 常见其他邮箱对应服务器：
# qq:smtp.qq.com 登陆密码：系统分配授权码
# 163:stmp.163.com 登陆密码：个人设置授权码
# 126:smtp.126.com 登陆密码：个人设置授权码
# gmail:smtp.gmail.com 登陆密码：邮箱登录密码
smtp = smtplib.SMTP_SSL('smtp.qq.com')
# 登陆qq邮箱，密码需要使用的是授权码
smtp.login(sender, 'abcdefghijklmn')
smtp.sendmail(sender, receivers, message.as_string())
smtp.quit()
print("邮件发送成功")
except smtplib.SMTPException:
print("Error: 无法发送邮件")
html = """ <html> <body> <h2> HTML </h2> <div style='font-weight:bold'> 格式邮件 </div> </body> </html> """ message = MIMEText(html,'html', 'utf-8')
html = """
<html>
<body>
<h2> HTML </h2>
<div style='font-weight:bold'>
格式邮件带图片
</div>
<img src="cid:imageTest">
</body>
</html>
"""
message = MIMEMultipart('related')
messageAlter = MIMEMultipart('alternative')
message.attach(messageAlter)
messageAlter.attach(MIMEText(html, 'html', 'utf-8'))
# 指定图片为当前目录
fp = open('test.png', 'rb')
messageImage = MIMEImage(fp.read())
fp.close()
# 定义图片ID，和图片中的ID对应
messageImage.add_header('Content-ID', '<imageTest>')
message.attach(messageImage)
from email.mime.multipart import MIMEMultipart
message = MIMEMultipart()
message.attach(MIMEText('这里一封带附件的邮件！', 'plain', 'utf-8'))
# 添加附件
# 其他格式如png,rar,doc,xls等文件同理。
attach = MIMEText(open('test.txt', 'rb').read(), 'base64', 'utf-8')
attach["Content-Type"] = 'application/octet-stream'
attach["Content-Disposition"] = 'attachment; filename="test.txt"'
message.attach(attach)
