Use Inline CSS: Most email clients do not support external stylesheets. Use inline styles for consistency. Minimize Use of JavaScript: JavaScript is often blocked by email clients. Avoid using it to ensure your email renders correctly. Optimize Images: Compress images to reduce load times. Use alt text for better accessibility and fallback. Limit the Use of Divs: Use tables for layout as they are more widely supported than divs in email clients. Test Across Platforms: Use tools to test your email across different clients and devices to ensure consistent rendering.