gmailAutodelete.js

// Original author fwed (contact@fwed.fr)
// Modified from
// https://gist.github.com/anonymous/2cca33d376f7f924fdaa67891ad098cc
// https://medium.com/@fw3d/auto-archive-emails-in-gmail-after-2-days-1ebf0e076b1c

function gmailAutocleanup() {
  var delete_after = "3d";
  var archive_after = "1m";
  
  // ifttt Weather
  gmailBatchDelete("action@ifttt.com", "tomorrow", delete_after);
  
  // myheritage
  gmailBatchDelete("notify2@myheritage.com", "Kalendererinnerungen", delete_after);
  
  // gcal
  gmailBatchDelete("calendar-notification@google.com", "Tägliche Terminübersicht", delete_after);
  
  // archive forum notifications
  gmailBatchArchive("forum@plentymarkets.eu", archive_after);
  gmailBatchArchive("studio@synesty.com", archive_after);
  gmailBatchArchive("support@synesty.com", archive_after);
  gmailBatchArchive("noreply@synesty.com", archive_after);
}

function gmailBatchDelete(from, subject, older_than) {
  var threads;
  var thread;
  var string = "from:" + from + " subject:" + subject + " older_than:" + older_than;
  
  threads = GmailApp.search(string);
  var num = threads.length;
  Logger.log("found " + num + " threads older than " + older_than + " for " + from + "\nsearch string = " + string);
  
  for(var i = 0; i < threads.length; i++)
  {
    var thread = threads[i];
    GmailApp.moveThreadToTrash(thread);
  }
  Logger.log("finished deleting " + num + " threads\n");
}

function gmailBatchArchive(from, older_than) {
  var threads;
  var thread;
  
  var string = "from:" + from + " in:inbox -in:starred is:read older_than:" + older_than;
  threads = GmailApp.search(string);
  var num = threads.length;
  Logger.log("found " + num + " threads older than " + older_than + " for " + from + "\nsearch string = " + string);
 
  for(var i = 0; i < threads.length; i++)
  {
    var thread = threads[i];
    GmailApp.moveThreadToArchive(thread);
  }
  Logger.log("finished archiving " + num + " threads\n");
}