There are several strategies you can use to limit external content in your emails:
Embed Images: Instead of linking to images hosted on an external server, embed them directly into the email. This ensures that the images are loaded quickly and reliably. Use Inline CSS: Instead of linking to external stylesheets, use inline CSS to style your emails. This reduces the number of external requests and helps to ensure consistent rendering. Minimize Use of Videos: Videos can significantly slow down email load times. Instead of embedding videos, consider using a static image with a play button that links to the video hosted on your website. Optimize Content: Compress images and other content to reduce their size, ensuring faster load times and better performance.