Polish Telecom
I just added Polish Telecom to my blacklist because they're spamming scum. For at least a couple of weeks now I've been getting spam claiming to be from "David.Billinghurst". All of it originates in Polish Telecom's ADSL space, and a worrying amount of it gets past spamassassin. They've had plenty of time to notice this and put a stop to it. That they have not done so indicates that they approve of it. Consequently, I no longer approve of them, and will no longer accept SMTP connections from anywhere in 83.0.0.0/11. I urge you to do the same