What are some common pitfalls to avoid in HTML and CSS for email marketing?
Some common pitfalls include over-reliance on images, which may not load automatically, using unsupported CSS features, and not testing emails across different email clients. Another issue is neglecting accessibility, such as not providing alt text for images or using color combinations that are hard to read. Keeping the code clean and simple while ensuring it is tested thoroughly can help avoid these pitfalls.