Netware 6.5.8 + GW 8.0.2.

Every day I have ackers trying to login in my GWIA from a POP3 account using automated software.

I want to do something like this:

If trying to login from an IP address in GWIA from a POP3 account and fail more then 5 times in the username or in the password,, then this IP is blocked and no more logins can be make from this IP.
Make GWIA this action, it send an e-mail to system administrator reporting this action.

Is this possible in GW 8.0.2?
If not, how can I block this IP address to attempt login in my server?