To be honest it a lot of people have been doing the same thing, maybe it takes a while. Does it say an Administrator has banned it? If so, then you're IP BANNED and an Admin needs to do it, not the e-mail.
It's actually very natural here. I have noticed it also, and due to the influx of people i'm sure it's fine and it is only temporary. It's not your modems, it's just Sythe, it only happens occasionally.