You should keep your email newsletter short and to the point. You must aim for a length that is easy for your subscribers to read. You can aim for around 200 to 400 words. You should avoid long paragraphs. You must use bullet points and headings to break up the text. You need to get your message across quickly. You should focus on quality over quantity. You must make sure your content is valuable and engaging. You should also leave room for a clear call to action. You must remember your audience's time is limited, so keep it concise.