因此，我创建了mern stack电子商务应用程序，使用nodejs作为服务器。我试图向新用户发送确认电子邮件，使用nodemailer和gmail作为主机。我试图启用两步验证并生成密码，但我仍然没有收到任何电子邮件，并且还收到标题中写的错误。有人能帮忙吗？

我创建的包含发送邮件功能的类：

import nodemailer from 'nodemailer';
export const sendEmail=async(subject,message,send_to,send_from,reply_to)=>{
    var transporter=nodemailer.createTransport({
      service:process.env.EMAIL_SERVICE,
      auth:{
        user:process.env.EMAIL_USER,
        pass:process.env.EMAIL_PASS
      },
      tls:{
      rejectUnauthorized:false,
      }
    });
    const options={
      from:send_from,
      to:send_to,
      replyTo:reply_to,
      subject,
      html:message,

    }
    transporter.sendMail(options,function(err,info){
      if(err){
        console.log(err)
      }
      else{
        console.log(info) 
       }
    })
    
    }
    export default sendEmail;

报名途径：

export const register=catchAsync(async(req,res,next)=>{
  const{fullName,email,password,confirmPassword,type,Wishlist}=req.body;
  if(!fullName||!email||!password||!confirmPassword||!type){
    return next(new ErrorHandling("One or more of the fields is empty",400));
  }
  if(password!=confirmPassword){
    return next(new ErrorHandling("Password fields does not equal",400));
  }
  if(!validateEmail(email)){
    return next(new ErrorHandling("The email you entered is illegal",400));
  }
  if(await User.findOne({email})){
    return next(new ErrorHandling("Email already exists",400));
  }
  try{
  await sendEmail('Consumer account confirmation',`<h3>Welcome to Base herbal cosmetics</h3><p>Thank you for your registration</p><button>press here to join</button>`,process.env.EMAIL_USER,email,email)
  }catch(err){
    return next(new ErrorHandling(err.message,err.statusCode));
  }
 const newUser=await User.create({
    fullName,
    email,
    password,
    confirmPassword,
    type,
    Wishlist
 })  

 res.status(201).json({
    status:"success",
    data:{
        newUser
    }
})

});

值得一提的是，用户确实添加到我的数据库和一切，但电子邮件工作正常。