Delete email with google apps script matching certain time conditions

Question

Delete gmail received between midnight and 1am matching certain conditions

Answer 1

Create a filter that assigns a label to a messages from a server, for example, MyServer. Then you can use code like this:

function delMsg() {
  // Setting the time range for checking
  var FROM = 0; // Minutes after midnight (start of range)
  var TO = 75; // Minutes after "FROM" (length of range)
  var label = GmailApp.getUserLabelByName("MyServer");
  var threads = label.getThreads();
  for (var i = 0; i < threads.length; i++) {
    var messages = threads[i].getMessages();
    var date = messages[0].getDate();
    var hour = date.getHours();
    var minutes = date.getMinutes();
    if ((hour * 60 + minutes >= FROM) && (hour * 60 + minutes <= FROM + TO)) {
      Logger.log(messages[0].getDate());
      Logger.log(messages[0].getSubject());
      messages[0].star();
      // messages[0].moveToTrash();
    }
  }
}

In this example messages sent between midnight and 1:15 will be starred. To remove them uncomment messages[0].moveToTrash()