Apple's HIG emphasizes a clean and organized layout. Here are some key points to consider:
Margins and Padding: Use adequate margins and padding to ensure that your content does not appear cluttered. This makes your email easier to read and navigate. Responsive Design: Ensure that your email design is responsive and adapts well to different screen sizes. This is crucial as users may open your email on various Apple devices. Hierarchical Structure: Organize your content in a hierarchical manner, using headings and subheadings to guide the reader through the email.