转载：https://blog.csdn.net/auto_mind/article/details/87747206?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
python 自动发送邮件
python库自带的两个模块，email和smtplib模块，直接import就能用
smtplib：主要用于连接邮箱服务器，登录邮箱，发送邮件（指定发件人，收件人，内容）
email：主要用于构建邮件内容（文本、html、图片文件附件等）
1.smtplib
# 普通连接，明文传输
smtp = smtplib.SMTP('email_server', port)
# SSL加密，用于QQ等邮件发送
smtp = smtplib.SMTP_SSL('email_server', port)
smtp.login('username', 'password')
# receiver可以是一个列表；msg.as_string()是email模块所构建的内容
smtp.sendmail('sender', 'receiver', msg.as_string())
# 结束回话
smtp.quit()
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邮箱开启smtp服务才能成功连接，普通连接端口是25，SSL加密连接端口是其他，如下图
注意：这里的password并非邮箱密码，而是开启smtp服务后的授权码
2.email
常用的模块有：MIMEText，MIMEImage，MIMEMultipart
2.1 MIMEText
纯文本
# 构造文字内容
text = "this is a test"
text_plain = MIMEText(text, 'plain', 'utf-8')
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超文本
# html
html = """
<html>
<body>
<h1>this is a test,don't scared!</h1>
<a href = 'https://www.baidu.com'>click it plz!</a>
</body>
</html>
"""
msg_html = MIMEText(html, 'html', 'utf-8')
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文件附件
file = open(u'数字权利激活.rar','rb').read()
msg_file = MIMEText(file,'base64','utf-8')
msg_file['Content-Disposition'] = "attachment;filename='数字权利激活.rar'"
msg_file['Content-Type'] = 'application/otcet-stream'
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2.2 MIMEImage
photo_file = open(rage your dream.jpg', 'rb').read()
msg_image = MIMEImage(photo_file)
msg_image['Content-Disposition'] = "attachment;filename='rage your dream.jpg'"
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2.3 MIMEMultipart
常见的multipart类型有三种：multipart/alternative,multipart/related和multipart/mixed。
邮件类型为"multipart/alternative"的邮件包括纯文本正文（text/plain）和超文本正文（text/html）。
邮件类型为"multipart/related"的邮件正文中包括图片，声音等内嵌资源。
邮件类型为"multipart/mixed"的邮件包含附件。向上兼容，如果一个邮件有纯文本正文，超文本正文，内嵌资源，附件，则选择mixed类型。
#我们一般用
msg = MIMEMultipart(‘mixed’)
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我们必须把Subject，From，To，Date添加到MIMEText对象或者MIMEMultipart对象中，邮件中才会显示主题，发件人，收件人，时间（若无时间，就默认一般为当前时间，该值一般不设置）。
sender = 'xxxx@qq.com'
password = 'ddlwzfotwvtwbeeg'
fromer = 'xx<xxx@qq.com>'
subject = u'这只是一个测试'
receiver = ['xxx@qq.com']
server = 'smtp.qq.com'
port = 465
msg = MIMEMultipart('mixed')
msg['Subject'] = subject
msg['To'] = ';'.join(receiver)
msg['From'] = fromer
msg['Date'] = '2019-2-20'
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说明：
msg.add_header(_name,_value,**_params):添加邮件头字段。
msg.as_string():是将msg(MIMEText对象或者MIMEMultipart对象)变为str,如果只有一个html超文本正文或者plain普通文本正文的话，一般msg的类型可以是MIMEText；如果是多个的话，就都添加到MIMEMultipart，msg类型就变为MIMEMultipart。
msg.attach(MIMEText对象或MIMEImage对象):将MIMEText对象或MIMEImage对象添加到MIMEMultipart对象中。MIMEMultipart对象代表邮件本身，MIMEText对象或MIMEImage对象代表邮件正文。
以上的构造的文本，超文本，附件，图片都何以添加到MIMEMultipart(‘mixed’)中：
msg.attach(msg_plain)
msg.attach(msg_html)
msg.attach(msg_file)
msg.attach(msg_image)
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附完整代码:
# coding: utf-8
# @Time : 2019/2/19 19:58
# @Author : lsn
# @Email : lishuning@huawei.com
# @File : emali_auto_send.py
# @Software: PyCharm
# function : 自动发送邮件，文本图片附件
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.mime.multipart import MIMEMultipart
import smtplib
if __name__ == '__main__':
username = 'xxxx@qq.com'
password = 'ddlwzfotwvtwbeeg'
fromer = 'xx<xxx@qq.com>'
subject = u'这只是一个测试'
receiver = ['xxx@qq.com']
server = 'smtp.qq.com'
port = 465
msg = MIMEMultipart('mixed')
msg['Subject'] = subject
msg['To'] = ';'.join(receiver)
msg['From'] = fromer
msg['Date'] = '2019-2-20'
# html
html = """
<html>
<body>
<h1>this is a test,don't scared!</h1>
<a href = 'https://www.baidu.com'>click it plz!</a>
</body>
</html>
"""
msg_html = MIMEText(html, 'html', 'utf-8')
msg.attach(msg_html)
# 图片
photo_file = open('rage panda.jpg', 'rb').read()
msg_image = MIMEImage(photo_file)
msg_image['Content-Disposition'] = "attachment;filename='rage your dream.jpg'"
msg.attach(msg_image)
# file 文件
file = open(u'数字权利激活.rar','rb').read()
msg_file = MIMEText(file,'base64','utf-8')
msg_file['Content-Disposition'] = "attachment;filename='数字权利激活.rar'"
msg_file['Content-Type'] = 'application/otcet-stream'
msg.attach(msg_file)
# 普通连接，明文传输
# smtp = smtplib.SMTP(server, port)
# SSL加密，用于QQ等邮件发送
smtp = smtplib.SMTP_SSL(server, port)
smtp.login(username, password)
# receiver可以是一个列表；msg.as_string()是email模块所构建的内容
smtp.sendmail(username, receiver, msg.as_string())
# 结束回话
smtp.quit()
pass