Another disadvantage when it comes to Outlook is that you are somewhat limited in terms of creativity and design. Unlike a professional newsletter software, Outlook doesn’t come with any ready-made templates. What’s more, you can only use the fonts that are available in the system. You are also restricted when using specifications such as float, margin or padding.
Look into the statistics of your blog, what are the articles which are driving the biggest amount of traffic? It might be worthwhile to convert those blog post into white papers and setting up a landing page for them. Setting up a landing page takes to much time? Just offer for people to download the post in PDF format in exchange for their email address.