Outlook has the ability to block specific senders, you can make up your own list of blocked senders.
It can be found here
"Outlook--tools--message rules---blocked senders"
also notify your ISP of the spam, many have specific procedures to report spam & may help eliminate it
It can be found here
"Outlook--tools--message rules---blocked senders"
also notify your ISP of the spam, many have specific procedures to report spam & may help eliminate it