I have this code to save email using draft

module.exports.saveDraftMessage = async (req, res, next) => {
  try {

    const imap = new Imap(imapConfig);
    imap.once('ready', () => {      imap.openBox('Drafts', false, (err, box) => {
        if (err) throw err;
        let str = "to:" + '[email protected]' + " subject:" + 'Test Draft Mail' + " body: " + 'This is Draft Mail' + " text: " + 'Draft Mail Body';

        imap.append(str);
      })
    });
    imap.once("error", err => {
      console.error("IMAP connection error:", err);
      if (err)
        res.status(500).json({ error: "An error occurred.", });
      imap.end();
    });
    if (imap.state == 'disconnected') {
      imap.connect();
    }
  }
  catch (error) {
    console.log("error ==> ", error)
    res.status(500).json({ error: "An error occurred.", });
  }
}

when i execute this method error is not there but while fetching Drafts mail it is not retrieved.

fetch method:

module.exports.getDraftMessage = async (req, res, next) => {
  try {
    const imap = new Imap(imapConfig);
    imap.on("ready", () => {
      imap.openBox("Drafts", true, (error, box) => {
        if (error) throw error;
        
        console.log('Connected!')

        imap.search(['ALL', ['SUBJECT', 'Test Draft Mail']], function (err, results) {
          if (err){
              console.log('failed to search the mail.');
          } else {
              if (!results || !results.length){
                  console.log('no mails!!!');
                  imap.end();
              } else {
                  var f = imap.fetch(results, {bodies:''}); 
                  f.on('message', function (msg, seqno) {
                      msg.on('body', function (stream, info) {
                          simpleParser(stream, function (err, mail) {
                              console.log(mail.from);
                              console.log('==================');
                              console.log(mail.subject);
                              console.log('==================');
                              console.log(mail.date);
                          })
                      });
                      msg.once('end', function() {
                          console.log(seqno + 'finished.');
                      });
                  });
                  f.once('error', function(err) {
                      console.log('failed to fetch: ' + err);
                  });
                  f.once('end', function() {
                      console.log('succeed in getting all mails!');
                      imap.end();
                  });
              }
          }
      })
        imap.on("mail",  () => {
          console.log("New one!")
        })
      });
    });
    if (imap.state == 'disconnected') {
      imap.connect();
    }
  }
  catch (error) {
    console.log("error ==> ", error)
    res.status(500).json({ error: "An error occurred while fetching mails.", });
  }
}

Any solution Thanks