Google Script for Reply-To-Later

function findEmailsToReplyTo(){
  var threads = GmailApp.getUserLabelByName("_rtl").getThreads();
  var subjs = "";
  for(var i = 0; i < threads.length; i++){
    var MRMsg = threads[i].getMessages()[threads[i].getMessageCount() - 1];

    if(MRMsg.getFrom() != "XYZ <xyz@gmail.com>")
    {
      subjs += threads[i].getFirstMessageSubject() + " - ";
      subjs += getNiceFrom(threads[i].getMessages()[0].getFrom()) + "| ";
    }
  }

  if(subjs.length > 0)
  {
    var email = Session.getActiveUser().getEmail();
    var body = ' ';
    GmailApp.sendEmail(email, subjs, body);
  }
}

function getNiceFrom(from) {
  if(from.indexOf("<") > 0 && from.indexOf(">") > 0) {
    return from.substring(0, from.indexOf("<"));
  }
}

/**
 * Retrieves all inbox threads and logs the respective subject lines.
 * For more information on using the GMail API, see
 * https://developers.google.com/apps-script/class_gmailapp
 */
function processInbox() {
  // get all threads in inbox
  var threads = GmailApp.getInboxThreads();
  for (var i = 0; i < threads.length; i++) {
    // get all messages in a given thread
    var messages = threads[i].getMessages();
    // iterate over each message
    for (var j = 0; j < messages.length; j++) {
      // log message subject
      Logger.log(messages[j].getSubject());
    }
  }
};

/**
 * Retrieves a given user label by name and logs the number of unread threads
 * associated with that that label.
 * For more information on interacting with GMail labels, see
 * https://developers.google.com/apps-script/class_gmaillabel
 */
function processLabel(labelName) {
  // get the label for given name
  var label = GmailApp.getUserLabelByName(labelName);
  // get count of all threads in the given label
  var threadCount = label.getUnreadCount();
  Logger.log(threadCount);
};


/**
 * Marks the email thread with the specified ID as important.
 * For more information on interacting with GMail threads, see
 * https://developers.google.com/apps-script/class_gmailthread
 */
function markThreadImportant(threadId) {
  var thread = GmailApp.getThreadById(threadId);
  thread.markImportant();
};