You can try using the block and filter facilities but they rarely make any difference as spammers usually disguise the sender's true address or rapidly change the address they csend them from- there are an infinite number of sender addresses they can generate.
The best way is to just ignore them (although I find some genuine emails go to spam occasionally so I have to check all before deleting for known senders) .... or just start using a new email address which you only give to trusted contacts