Creating HTML blocks involves coding skills and understanding of HTML and CSS. Here are the basic steps:
Set up the basic HTML structure with a <table> element to ensure compatibility across email clients. Add <tr> and <td> elements to create rows and cells for different blocks. Use inline CSS to style the blocks, ensuring that styles are correctly rendered in various email clients. Include media queries for responsive design to adapt the layout for different screen sizes. Test the email across different devices and clients to ensure proper display and functionality.