When You receive a new message, You have an opportunity to apply any filter to sender straight in the message reading view. To do that:

1. open the message;
2. click on the name of sender;
3. in the drop-down menu choowse option "Create a filter".

After this You'll get redirected to the "Options"  section, where You are able to finish adding any filter to the certain sender.
More about filters - here.

Create filters to the letters that you don’t want to receive installing condition either automatically delete these messages, or move them to a Spam folder.

By creating a filters, install the appropriate conditions, make filter to the addresses not e-mails from which messages are coming (for example, email45@spammerdomain.com lock the domain spammerdomain.com)

In the case if using filters does not help and spam to your mailbox come in a large scale, use increased protection against spam.

!Please note that in increased spam protection mode, there is a possibility that the conventional (important for you) letters, in some cases, may also mistakenly moved to the Spam folder. Don’t publish your e-mail address in public sites, try to unsubscribe from different letter receiving and never reply to spam messages. Other suggestions see here 

1. Open a specific letter, in its title, next to the word "From" click on the sender's address.

2.On the pop-up menu, select "Create a filter" and set the condition move those messages to the folder "Incoming”. 

According to the user's wishes, folder may not filter messages that are marked as spam, but move them to another folder or leave them in the folder "Incoming”. If you want it, disconnected the spam filter.