Question: What can I do to reduce the amount of spam that I get in Apple Mail?
Answer: Email spam is a problem we all face if you use Apple Mail or another desktop email client, rather than a service such as Gmail or iCloud. One way to get a handle on this is to install SpamSieve on your Mac. SpamSieve costs $30, but there is a free trial available
After installing the software and spending a minutes training it, you should be able to reduce the level of junk email to almost zero.