Notion Mail is a new email application that integrates Notion's organizational features into email management. It allows users to sign in through Gmail, Apple, and Microsoft, and offers a unique approach to email organization by using 'views' and 'auto labels'. Views can be customized with filters and sorting, similar to a database, and auto labels help narrow down emails based on specific prompts, such as customer service inquiries or emails from specific people. This feature is similar to those offered by other applications like Superhuman and Fixer. Additionally, Notion Mail allows users to create templates for organizing emails by priority, calendar events, and more. The application also enhances email composition by allowing users to write emails as if they were creating a Notion page, using slash commands and snippets for quick access to templates and frequently used content. Notion Mail includes a feature for scheduling meetings directly within the email interface, providing a clean view of the user's calendar and allowing for easy selection of meeting times. The application also supports AI-assisted email replies, which can draft responses based on context from Notion pages. Users can create auto labels for specific types of emails, such as sponsorships, to streamline email management. The settings allow for customization of the inbox layout, auto labels, and integration with Gmail filters.