The Email Block plugin allows users to draft and plan emails directly within Obsidian notes. By using a structured code block, users can define email parameters such as recipients, subject, and body content. The plugin supports referencing notes as the email body and incorporating variables for placeholders, which can be dynamically replaced. It also provides options to include 'mailto' links for easy email launching. This plugin is ideal for those who want to organize and format email drafts efficiently while integrating them into their existing Obsidian workflow.