Some spam is being sent to a non existing email address.

I can see those messages in the reports. Can I filter them out to keep the report a bit more clean?

The email has been accepted because one of the recipient domains is managed by the protector:

To reject email messages addressed to a valid domain, it's necessary to add all the valid email addresses in the "Domain User Management"

An option to reduce this type of spam is activate the grey listing or add the sender domains to the Hard Block List.
When a message that has passed the grey listing and the hard block filters is caught as spam, it will be necessarily added to the spam report