You can edit and delete email notifications automatically sent when a user pushes to a repository.
Note: GitHub Services, the underlying app that allowed users to customize notifications for pushes to repositories, is no longer supported as of October 1, 2018. You can edit and delete existing Services until January 31, 2019. For more details, see the blog post. To continue this setup, we recommend exploring a self-hosted third-party service or open source solution. For information on updating GitHub Services to webhooks, see the Replacing GitHub Services guide.
Disabling email service notifications for pushes to your repository
On GitHub, navigate to the main page of the repository.
Under your repository name, click Settings.
Click Integrations & Services.
Under "Services", next to your added email service, click .