python3使用465端口发送邮件来解决阿里云封闭25端口问题

import smtplib
from email.mime.text import MIMEText
from email.utils import formataddr
 
#发件人邮箱账号
my_sender = 'xx@126.com'
 
#发件人邮箱密码 密码不是真正的密码是 授权码，授权码是用于登录第三方邮件客户端的专用密码。
my_pass = 'xx'
 
#收件人邮箱账号，我这边发送给自己
my_user = 'xx@qq.com'
 
def mail():
    ret = True
    mail_msg = "Python 邮件发送测试"
    msg = MIMEText(mail_msg, 'html', 'utf-8')
    msg['From'] = formataddr(["Rocky", my_sender])
    msg['To'] = formataddr(["Amy", my_user])
    msg['Subject'] = '邮件主题'
    server = smtplib.SMTP_SSL("smtp.126.com", 465)
    server.login(my_sender, my_pass)
    server.sendmail(my_sender, [my_user, ], msg.as_string())
    server.quit()
    ret=False
 
    return ret
    ret = mail()
    if ret:
        print("邮件发送成功")
    else:
        print("邮件发送失败")
mail()