From newbie readme:
You can only post once every 360 seconds to start and there are a few other things that trigger this timer such as logging in and searching.
As a newbie and jr member, you need to wait 360 between each posts, and logging in and search as well.
I can't seem to find any reference to the IP message in particular in the sticky. I found other people complaining about the issue in other threads...
Yes, this question has been asked in many other threads, and has been
answered in many other threads.
One example is here.
https://bitcointalk.org/index.php?topic=267715.msg3089326#msg3089326