You can create a newsletter in Outlook for desktop using a few workarounds, including importing third-party templates, designing basic features within the application, and adding images to edit the template. Saving your newsletter as a template allows you to reuse it by clicking "File > New > Email From Template". Additionally, creating a group in Outlook enables easy management of recipients for your newsletter mailing list, and sending a newsletter involves navigating to the BCC field with the created group name. While Outlook isn't ideal for creating newsletters, some features like formatting options and image addition are available, and third-party template apps can enhance the experience. Automating processes using Zapier is also possible by integrating it with other applications.