I agree I would rather not have an inbox full of junk mail but it is still frustrating when in the first week of the new contract they bounced over 50 emails I sent simply because they had admin@... in the sender's address.
Seems a bit amateur on their part. To be both stuffed full of junk and yet missing key messages seems a poor result. I adjust my own server to let messages through if in doubt - conscious that I will get spam, but at least I don't miss borderline messages.