# 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

function batchDeleteEmail() {
  var batchSize = 100 // Process up to 100 threads at once
  var threads = GmailApp.search('label:inbox from:user@example.com');
  for (j = 0; j < threads.length; j+=batchSize) {
    GmailApp.moveThreadsToTrash(threads.slice(j, j+batchSize));
  }
}