gistfile1.txt

function fetchEmails = function (range, options, query, mailbox, done) {
  var emails = [];

  if(!mailbox)
    return done({error: 'mailbox not ready'});

  query.cb = function (fetch) {
    fetch.on('message', function (msg) {
      var headers = {},
          body = '';

      msg.on('headers', function (hdrs) {
        headers = hdrs;
      });

      msg.on('data', function (chunk) {
        body += chunk.toString('utf8');
      });

      msg.on('end', function () {
        emails.push({
          seq: msg.seqno,
          gmid: msg['x-gm-msgid'],
          thrid: msg['x-gm-thrid'],
          headers: headers,
          structure: msg.structure,
          body: body
        });
      });
  };

  imap.seq.fetch(range, options, query, function (err) {
    if(err)
      return done(err);

    done(null, emails);
  });
}