WordPress sends several email notifications to the site administrator as well as other users on your website. This includes important email notifications such as forgot password emails, website error and recovery emails, new user registration, and more.
By default, it uses 'WordPress' as the sender's name and a non-existent email address (wordpress@yourdomain.com) as the sender's email.
Many spam filters block your WordPress emails, believing them to be junk. Sometimes it does not even make it to the spam folder, but is deleted immediately due to filters.
The outgoing email notifications are important, and you should use your own brand and email address. This increases the authenticity of your brand and increases name recognition among your users.