Inline CSS: Use inline CSS to ensure styles are correctly applied across different email clients. Table-based Layouts: Utilize tables for layout purposes as they are more consistently rendered by email clients. Alt Text: Always include alt text for images to improve accessibility and provide context if images do not load. Fallback Fonts: Specify fallback fonts to ensure text is readable even if custom fonts are not supported. Test Thoroughly: Test emails across multiple email clients and devices to identify and fix rendering issues.