Email Bounce Handler with Google Sheets and Gmail

This n8n workflow automates the process of monitoring email delivery failures, specifically bounce messages, and updating a Google Sheet to flag problematic email addresses. It begins with a manual trigger to initiate the process, extracts email addresses from the email body using a code node, then searches Gmail’s spam folder for bounce or failure messages. The workflow identifies emails marked as ‘Undelivered’ or ‘Failure’ in the subject line, extracts those email addresses, and matches them against a Google Sheets contact list. If a match is found, it updates the corresponding row to indicate a delivery error. This automation is particularly useful for email marketers and support teams who need to maintain clean mailing lists by automatically flagging hard-bounced email addresses.