到目前為止，這是我正在解決的代碼function sendMail(req,res){    var transporter = nodemailer.createTransport({    host:process.env.NODEMAILER_HOST,    port:process.env.NODEMAILER_PORT,    auth: {      user: process.env.NODEMAILER_ADDRESS,      pass: process.env.NODEMAILER_PASS    }  })     mailOptions = {      from: req.body.from,      to: req.body.to,      cc: req.body.cc,      bcc: req.body.bcc,      subject: req.body.subject,      text: req.body.text,      html: req.body.html,      attachments: [        {          filename: req.body.attachments[0].filename,          path: req.body.attachments[0].path,          contentType: req.body.attachments[0].contentType        },{          filename: req.body.attachments[1].filename,          path: req.body.attachments[1].path,          contentType: req.body.attachments[1].contentType        }      ]    }  transporter.sendMail(mailOptions,function(error,info){      if(error){        console.log(error);        return res.status(400).json("Failed to Send");      }else{        res.status(201).json(req.body);      }    });}這是我的請求正文{"from": "example1@gmail.com","to": "example2@gmail.com","cc": "example3@gmail.com","bcc": "test@example.com","subject": "Test Request 1","text": "Example Text 1","html": "<p>Some Paragraph</p>","attachments": [    {        "filename": "test.doc",        "path": "dirname/test.doc",        "contentType": "application/doc"    },{        "filename": "test-coverted.pdf",        "path":  "dirname/test-converted.pdf",        "contentType": "application/pdf"            }]}如何遍歷附件而不在郵件選項中一一定義？因為如果我迭代 mailOptions 那么我需要創(chuàng)建單獨的傳輸，這反過來將為不同的附件發(fā)送不同的電子郵件。