A Google Apps Script script to bulk delete large amounts of email in Gmail while avoiding the error #793 which Gmail encounters normally

batch-process-gmail-emails.js

// This script, when used with Google Apps Scripts will delete 500 emails and can be triggered to run every minute without user interaction enabling you to bulk delete email in Gmail without getting the #793 error from Gmail.

// Configure the search query in the code below to match the type of emails you want to delete
// Browser to https://script.google.com/.
// Start a script and paste in the code below. 
// After you past it in, save it and click the little clock looking button. This is for your triggers. You can set up how frequently you want the script to run (I did mine for every minute).
// Source: https://productforums.google.com/d/msg/gmail/YeQVDuPIQzA/kpZPDDj8TXkJ

// Edits: Added functions to make the process more flexible
// Reference here: https://developers.google.com/apps-script/reference/gmail/gmail-app

function deleteFromUserExample() {
  processEmail('in:inbox from:user@example.com', 'moveThreadsToTrash');
}

function markReadLabelWork() {
  processEmail('label:work', 'markThreadsRead');
} 

function markReadFromInfoExample() {
  processEmail('from:user@example.com', 'markThreadsRead');
}

function processEmail(search, batchAction) {
  var batchSize = 100; // Process up to 100 threads at once
  var threads = GmailApp.search(search);
  for (j = 0; j < threads.length; j += batchSize) {
    GmailApp[batchAction](threads.slice(j, j + batchSize));
  }
}