如何在阿里云esc服务器，通过python使用smtp发送邮件？求助

环境：python3.7

import smtplib from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart from email.mime.application import MIMEApplication import sys

def sendEmail(title, text, send, to, passwd, smtp_server, file): msg = MIMEMultipart() msg['From'] = send msg['To'] = to msg['Subject'] = title strstr=text
att = MIMEText(strstr,'plain','utf-8') msg.attach(att) att = MIMEApplication(open(file,'rb').read())
att.add_header('Content-Disposition', 'attachment', filename=file) msg.attach(att) server = smtplib.SMTP() server.connect(smtp_server) #连接smtp邮件服务器 server = smtplib.SMTP_SSL(smtp_server, 465) server.login(send, passwd) #登录smtp邮件服务器 server.sendmail(send, to, msg.as_string()) #发送 server.close() #关闭

if name == 'main': today = '2020-09-14' smtp_server = 'smtp.qq.com' from_mail = '@qq.com' mail_pass = '**'
to_mail = '*@qq.com' title = '****{}'.format(today)
text = '-{}'.format(today) file = '{}_daily_data.csv'.format(today) sendEmail(title=title, text=text, send=from_mail, to=to_mail, passwd=mail_pass, smtp_server=smtp_server, file=file)

代码如上，465无法发送，代码报错，显示连接超时，问了阿里技术人员，说465和587都是可以正常连接的，但最后超时了。

关闭了防火墙，也添加了安全组，邮箱smtp服务已经打开。