It doesn't like your internet IP address for some reason, possibly marked as a source of spam.
If your IP address is dynamic, it could be related to a previous user of the address you have been assigned. If you are on a fixed IP, after checking any connected PCs or smartphones, it might be worth checking to see if there are any known exploits or security holes in the internet router you are using.
It could also be that your assigned IP has been spoofed at some point, and used as a bogus IP for spammers elsewhere in the world.