一、一般发邮件的方法
Python对SMTP支持有smtplib和email两个模块，email负责构造邮件，smtplib负责发送邮件。
注意到构造MIMETEXT对象时，第一个参数就是邮件正文，第二个参数是MIME的subtype，传入'plain'表示纯文本，最终的MIME就是‘text/plain’，最后一定要用utf-8编码保证多语言兼容性。
然后，通过SMTP发出去：
# coding:utf-8
import smtplib
from email.mime.text import MIMEText class SendMail: def send_mail(self, receiver_list, sub, content):
host = "smtp.qq.com" # 服务器地址
sender = "123@qq.com" # 发件地址
password = "pwd"
#邮件内容
message = MIMEText(content, _subtype='plain', _charset='utf-8')
message['Subject'] = sub # 邮件主题
message['From'] = sender
message['To'] = ";".join(receiver_list) # 收件人之间以；分割
server = smtplib.SMTP()
# 连接服务器
server.connect(host=host)
# 登录
server.login(user=sender, password=password)
server.sendmail(from_addr=sender, to_addrs=receiver_list, msg=message.as_string())
server.close() if __name__ == '__main__':
send = SendMail()
receive = ["123qq.com", "456@163.com"]
sub = "测试邮件"
content = "测试邮件"
send.send_mail(receive, sub, content)
其实，这段代码也并不复杂，只要你理解使用过邮箱发送邮件，那么以下问题是你必须要考虑的：
- 你登录的邮箱帐号/密码
- 对方的邮箱帐号
- 邮件内容（标题，正文，附件）
- 邮箱服务器（SMTP.xxx.com/pop3.xxx.com）
二、利用yagmail库发送邮件
yagmail 可以更简单的来实现自动发邮件功能。
首先需要安装库： pip install yagmail
然后：
import yagmail
class SendMail:
def send_mail(self, receiver_list, sub, content, attach=None):
host = "smtp.qq.com"
sender = "983@qq.com"
password = "ryg"
# 连接服务器
yag = yagmail.SMTP(user=sender, password=password, host=host)
# 邮件内容
yag.send(to=receiver_list, subject=sub, contents=content, attachments=attach)
if __name__ == '__main__':
send = SendMail()
receive = ["983@qq.com", "513@163.com"]
sub = "测试邮件"
content = ["yagmail测试邮件", "\n", "hello word"]
attch = "C:\\Users\\Administrator\\Desktop\\10.jpg"
send.send_mail(receive, sub, conten8t, attch)
另外，附件也可以之间写在content中，即conten = ["yagmail测试邮件", "\n", "hello word", "C:\\Users\\Administrator\\Desktop\\10.jpg"]
少写了好几行代码