@AdeGarci. I don’t think Duncan was saying you couldn’t use Sparkle for HTML newsletters/mailings - he was simply not recommending it and he was pointing out that there is no specific features in Sparkle to create these things in a predictable and reliable manner. However, as I pointed out in my response above, you can try it, but you have to keep things fairly simple. Don’t use any javascript or embed code. Keep it as text, images and graphics and design it in the iPad breakpoint. Upload it to your server and then open the page in Safari. You can then use Safari’s share/email this page option to send your email through Apple Mail. Always send to yourself first to check the results.