If you don't want your Gmail address and emails anymore, you can remove them from your Google account. Deleting them won't delete your entire Google account.
What happens when you delete your Gmail service
- Your emails and mail settings will be deleted.
- You can no longer use your Gmail address to send or receive email. If you change your mind, you may be able to get your Gmail address back.
- Your Gmail address can’t be used by anyone else in the future.
- Your Google account won’t be deleted; only your Gmail service will be removed. You’ll still have your activity and purchases that you made on Google Play.
Delete Gmail
If you use Gmail through your work, school or other group, contact your administrator.
- Before deleting your Gmail service, download your data.
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On your Android phone or tablet, open your device's Settings app
Google
- At the top, tap Data & personalisation.
- Under 'Download or delete your data', tap Delete a service. You might need to sign in.
- Next to 'Gmail', tap Delete
.
- Follow the steps on the screen.
Google 
.Fix problems
You want to recover your Gmail address & emails
If you change your mind, you may be able to get your Gmail address back. If it’s been a while since you removed your Gmail service, you might not be able to get your emails back.
- Go to Gmail.
- Follow the steps on the screen.
You want to delete your entire Google account
Find out how to delete your Google account. This action will delete your entire Google account, not just your Gmail service.
You can’t sign in
You need to sign in before you can delete your Gmail service. Get help accessing your account.