If you identify broken links or buttons after sending out an email campaign, the first step is to correct the issue in your email template for future sends. You can also: 1. Send a Follow-Up Email: Apologize for the inconvenience and provide the correct links. 2. Update Your Landing Page: If possible, redirect the broken link to a working page. 3. Notify Your Audience: Use social media or other communication channels to inform your audience about the correction.