如何解决Goddady企业邮箱24小时发送限额超出问题？

我用React+Node.js开发的联系表单已完成前后端开发，单日可正常发送25封邮件，但超出后会触发以下EENVELOPE错误：

error: {code: "EENVELOPE",…}
code: "EENVELOPE"
command: "MAIL FROM"
response: "550 User nermine.maxxx@xxxheia-sxxxos.xxx has exceeded its 24-hour sending limit. Messages to 25 recipients out of 25 allowed have been sent. Relay quota will reset in 7.82 hours."
responseCode: 550
sent: false

该邮箱是Outlook托管的Godaddy企业邮箱，网页端发送邮件正常，但仅联系表单通过SMTP发送受限。已咨询Godaddy客服未获有效解答，Node.js端源码如下：

const nodemailer = require("nodemailer");

exports.sendEmail = (req, res) => {
  const { name, email, message } = req.body;

  const transporter = nodemailer.createTransport({
    host: "smtpout.secureserver.net",
    port: 465,
    secure: true,
    auth: {
      user: "nesss.ssssrem@assssia-ssss.ssss",
      pass: "xxxxxx",
    },
    tls: {
      rejectUnauthorized: false,
    },
  });

  const messageHtml = `<div>This is a request sent from the website xxxxx</div><br/><div>${message}</div><br/><div>This is ${name} sending a request from xxxxxxx</div>`;

  const mailOptions = {
    from: "xxxxxxx.xxxxx@xxxxx-xxxxx.xxx",
    to: "xxxxxxx.xxxxx@xxxxx-xxxxx.xxx",
    subject: "Sending Email From Nermine",
    html: messageHtml,
  };

  transporter.sendMail(mailOptions, function (error, info) {
    if (error) {
      console.log(error);
      res.status(500).send({ sent: false, error: error });
    } else {
      console.log("Email sent: " + info.response);
      res.status(200).send({ sent: true, result: info.response });
    }
  });
};

解决方向： #

1. 调整SMTP中继配额
   Godaddy的SMTP中继配额与网页端发送配额是分开计算的，网页端不受限不代表SMTP配额相同。需再次联系Godaddy客服，明确提出调整SMTP中继的每日发送限额，或确认企业邮箱套餐是否有更高配额的SMTP服务选项。

2. 改用邮件发送API
   若SMTP配额无法调整，可尝试使用Godaddy提供的邮件发送API替代SMTP，部分企业邮箱套餐的API发送配额与网页端一致，或更高。

3. 优化表单邮件发送逻辑

• 批量发送：收集一定时间内的多条表单提交信息，合并为一封邮件发送，减少每日发送的邮件总数。
• 前端限流：在React端添加限制，比如同一IP每日最多提交3次，既避免触发配额限制，也能防止恶意提交。

4. 修正SMTP配置安全问题
   移除代码中tls.rejectUnauthorized: false的配置，该设置会跳过TLS证书验证，存在安全风险。同时确保mailOptions.from地址与SMTP认证的user地址完全一致，部分邮箱服务商要求发件人必须与认证账号匹配，否则可能额外消耗配额或触发限制。

内容的提问来源于stack exchange，提问作者Adeno