First lets discuss what does not work well.
Email accounts from your providers like, cable, cell phone,etc...
Email accounts from Yahoo and other ISPs...
Local mail client filters like, Mail, Outlook, etc...
What does work:
Google also known as gmail.com and iCloud from Apple, have some of the best spam filtering available.
So, if you really want to have less spam then get a free gmail or iCloud account.
You can slowly use gmail or iCloud as your main email account while still getting email throught your present email provider if you are concerned about all the people you have on your present account. Then over time slowing using gmail and iCloud as your main account, you will be able to get rid of your old email account.
Want a free gmail account, just go to:
and create an account.
Go to https://www.icloud.com
and sign in with your Apple ID.
ENJOY LESS SPAM!