If the user sysadmin invokes the mail command interface and there are no unread mail messages then the message that can be seen is No mail for sysadmin. This message will be displayed when the one who invoke the mail command will open the mailbox.
Answer:There just different
Explanation:
The world wide web, or web for short, are the pages you see when you're at a device and you're online. But the internet is the network of connected computers that the web works on, as well as what emails and files travel across. ... The world wide web contains the things you see on the roads like houses and shops.
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.
<u>Explanation:</u>
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.