Google Script: Auto-delete old Gmail emails

auto-delete-old-gmails.gs

/**
 * This script deletes Gmail email threads older than a set time.
 * 
 * To schedule this script to run once a week:
 * 1. In the Google Apps Script dashboard, click on the clock icon on the left sidebar.
 * 2. Click on the '+' button at the bottom right to add a new trigger.
 * 3. Set the function to "DeleteOldEmail", the deployment to "Head", and the event source to "Time-driven".
 * 4. Choose the "Week timer" option and select the day and time you'd like the script to run.
 * 5. Save the trigger. Ensure that you've granted the necessary permissions for the script to run.
 */

function DeleteOldEmail() {
    try {
        // Search for email threads older than 5 days. Adjust the "5d" as needed.
        var threads = GmailApp.search("older_than:5d");

        // If there are more than 0 threads, move them to trash in bulk.
        if (threads.length > 0) {
            GmailApp.moveThreadsToTrash(threads);
        }
    } catch (error) {
        // Log any errors for debugging.
        Logger.log("An error occurred: " + error.toString());
    }
}