Filter out "via" spam from Gmail (using script.google.com)

filterViaSpam.js

function processMessages(thread, label, search) {
  var messages = thread.getMessages();
  
  for (var j = 0; j < messages.length; j++) {
    var message = messages[j];
    var body = message.getRawContent();
    
    if (typeof search === 'string') { // used for single-string searches:
      if (body.indexOf(search) > -1) {
        thread.addLabel(label).markRead().markUnimportant().moveToArchive();
        break;
      }
    } else if (Array.isArray(search)) { // search for multiple addresses:
      for (var k = 0; k < search.length; k++) {
        if (body.indexOf(search[k]) >- 1) {
          thread.addLabel(label).markRead().markUnimportant().moveToArchive();
          break;
        }
        
        Utilities.sleep(50);
      }
    }

    Utilities.sleep(1000);
  }// for
}// processMessages(thread, label, search)

function processRecruiters(thread) {// filters all threads in the Inbox for spammy recruiters
  var label = GmailApp.getUserLabelByName('# Freelancing Leads/Awful Recruiters');
  var viaAddresses = [
    'email.bullhornmail.com',
    'ceipal.com',
    'conrepbkmail.com',
    'sm-conrep.com',
    'conrep-smtp.com',
    'consmtp.com',
    'ziprecruiter.com',
    'conrepbk.com',
    'joboppforyou.com',
    'conrepms.com',
    'bkconrep.com',
    'amigainformatics.net',
    'amigainformatics.com',
    'mmconrep.com',
    'jobdivabk.com',
    'mg.compqsoft.com'
  ];
  
  processMessages(thread, label, viaAddresses);
}// processRecruiters()

function processSwingShoes(thread) {// filters all threads in the Inbox for SwingShoes mailing list
  var label = GmailApp.getUserLabelByName('# Hobbies/Dance Classes');
  processMessages(thread, label, 'swingshoes.ccsend.com');
}// processSwingShoes()

function processJobDiva(thread) {// filters all threads in the Inbox for JobDivaBK
  var label = GmailApp.getUserLabelByName('# Freelancing Leads/Awful Recruiters');
  processMessages(thread, label, 'Received: from jobdivabk.com');
}// processJobDiva()

function filterViaSpam() {
  var threads = GmailApp.getInboxThreads(0, 10);
  for (var i = 0; i < threads.length; i++) {
    var thread = threads[i];
    processRecruiters(thread);
    processSwingShoes(thread);
    processJobDiva(thread);
  } // for
}

Be sure to check out the tutorial that inspired this script:
https://www.geektron.com/2014/01/how-to-filter-gmail-using-email-headers-and-stop-via-spam/

Hey @crates - do you have a new version of this script? I have a ton of job recruiter spam using jobopp domain and google's filters just aren't cutting it.