What you're asking cannot be done here. They have automated spam filters and if they fail, you're getting a lot of SPAM in your inbox.
With rules, you're at least doing a setup that blocks most of them. Not a solution but better than manually deleting tons of spam.
I'm not happy with this either.
You can try making some rules. The SPAM i received had more or less the same keywords, so i made a rule (settings-> mail -> rule) that checks for subject includes and message body includes the spam words and in action select to move them on junk folder and make them read (or delete them). I prefer to have them on junk folder so i can check for false positives.
Hope this helps a bit.
Best thing would be if they fix their SPAM filters.. last couple of days i getting really obvious spam on my inbox!
No, your answer didn't help at all.
The point is to block completely those spams, to receive the sender a message from his/her mail host as undelivered. To not even come to my email. Not to go even to spam or deleted folder.