Because, despite offering a set of all the essential features, Apple Mail’s functionality is limited in terms of advanced email management features when compared to most third-party email clients. While this native solution from Apple suffices the needs of most users, it is far from an ideal choice for those who need more control over their emails. If you are a Mac user, you have Apple Mail, the default email client pre-installed on your computer.
As a matter of fact, you will continue to need an email address to use the different apps and services you already do or to sign up for new ones in the future. Irrespective of which productivity, project management, and task management apps and services you use, emails will continue to constitute a significant chunk of your communication and work online.
