Here are some tips to optimize your emails for mobile clients: - Responsive Design: Use a responsive design that adjusts to different screen sizes. - Short Subject Lines: Mobile devices display fewer characters in subject lines, so keep them concise. - Single-Column Layout: A single-column layout is easier to read on smaller screens. - Large Fonts and Buttons: Ensure text and call-to-action buttons are large enough to be easily tapped. - Minimal Images: Use fewer images for faster load times and to avoid clutter.