“On a small screen, five or six sentences can look like a novel. You don’t want to overwhelm your subscribers. Keep your email messages short and consumable and link to longer or more detailed content on your website or blog.”
Think about how your emails look on mobile devices when writing them. A mere five sentences appears as a lot of content on a small screen, so make certain your emails are short, sweet, and to the point. You can always provide links to other content, such as those on landing pages.