The following article will show you the steps on how to Disable/Delete a new email account.
The email account must have domain administrator privilege
Step 1: Log in to the webmail via https://mail.yourdomain.com (replace yourdomain.com with your own domain).
Step 2: Proceed to Settings → Domain Settings → Accounts.
Step 3: Select the Accounts on the Left panel
Step 4: Click on the email account from the email account list.
Step 5: Edit the Mailbox Size Limit (MB) and Save it.
