Python smtp 协议发送邮件贼鸡儿慢

小弟日常撸 java ，最近上手摸了一下 python ，搞搞自动 docker save 镜像、压缩上传、然后发送邮件通知

到最后一步发送邮件了，用的 smtp 协议，结果发现发送邮件贼鸡儿慢，基本上 35 秒左右，但是我用 java 撸了一发，发现很快啊，5 秒内完事儿

下面是我的代码：

#!/usr/bin/python3

import smtplib
import traceback
from email.mime.text import MIMEText
from email.header import Header

def send_html_email(smtp_host, smtp_port, use_ssl, from_addr, from_name, password, to_addrs, cc_addrs, subject, content):
    try:
        msg = MIMEText(content, _subtype='html', _charset='utf-8')
        msg['Subject'] = Header(subject, 'utf-8')
        msg['From'] = "{}<{}>".format(from_name, from_addr)
        msg['To'] = ",".join(to_addrs)
        msg['Cc'] = ",".join(cc_addrs)
        if use_ssl:
            smtp = smtplib.SMTP_SSL()
        else:
            smtp = smtplib.SMTP()
        smtp.connect(smtp_host, smtp_port)
        smtp.login(from_addr, password)
        smtp.sendmail(from_addr, to_addrs, msg.as_string())
    except:
        print("邮件发送失败")
        traceback.print_exc()
    finally:
        smtp.quit()


if __name__ == '__main__':

    smtp_host = "mail.xxx.com.cn"
    smtp_port = 25
    from_addr = "xxx@xxx.com.cn"
    from_name = "xxx"
    password = "xxx"
    to_addrs = ["xxx1@xxx.com.cn"]
    cc_addrs = ["xxx2@xxx.com.cn", "xxx3@xxx.com.cn"]
    subject = "python SMTP 测试邮件"
    content = '<a target="_blank" href="http://192.168.200.128">测试链接</a>'

    send_html_email(smtp_host, smtp_port, False, from_addr, from_name, password, to_addrs, cc_addrs, subject, content)

用 126 邮箱、qq 邮箱、公司自己的邮箱发都一样的，35 秒左右，对比 java 5 秒左右，简直无地自容啊，各位彦祖指导一下，问题何在啊？先行谢过了

说错了，代码打印了一下，java 是 500 毫秒左右，之前估算的，应该主观上加了编译的时间