Since advertisement and newsletters are filled in inbox of jerry. There is no external software to do scanning removing unnecessary mails such as advertisement and newsletter.
Step-by-step explanation:
Best away or practice, jerry has to open each mail of advertisement and newsletter and unsubscribe the email address.
In future jerry should not click any link which comes in the inbox.
Once unsubscribe the newsletter and advertisements better to scan the computer any mail ware or spyware is attached on jerry laptop or workstation or pc.
There is no external web tool is available to unsubscribe in newsletter or advertisement for jerry mailbox.