To avoid incompatible formats, follow these best practices:
1. Use Responsive Design: Ensure your emails are mobile-friendly by using responsive design techniques. 2. Stick to Standard Fonts: Use web-safe fonts that are supported across most email clients. 3. Optimize Images: Compress images to reduce load times and ensure they display correctly. 4. Avoid Embedded Videos: Use [video thumbnails](href) with a [call-to-action](href) to watch the video on a landing page instead. 5. Simplify HTML/CSS: Stick to basic HTML and inline CSS to ensure compatibility.