I can not understand why testing the plugin banns the address I use , even fake addresses , it detects my ip as ban!
I'm going to admin-ban users and cancel but does not change anything new test new block

update post
i test the plugin with my friend in another office and he is also banned in the registration phase

If it ban your ip it might be marked as suspicious in 3rd party service.
Try to disable some of settings.
You should see also reason for ban.

it also blocks ip friends
then I'm doing tests...I deleted and reinstalled the plugin
it seems that the problem arises when I insert the translation into Italian (folder it_IT)
now I do it a few days in English only
and I see that happens
and update the post
thanks

but the plugin..
does not it work on the contact form?
because I have a user who continues to send spam messages from them
block email but spammer creates another email
Now I have blocked his ip
the plugin does not work there?
Or am I wrong?
thank you

@angela
It's checking email here only ad IP address of user is not retrieved by osclass.

@angela
It's checking email here only ad IP address of user is not retrieved by osclass.

now I locked him ip taken from the user profile,

mhhh...it takes an option that blocks text length, copy paste and disable links in the contact form?
or
is there a plugin with these features?
thanks

(update)   
now the plugin works well
it was conflicts with the translation, some confused strings.
I lock links insertion I solved this way:
I banned the following words:
.it,.com,.net, ecc...

but can you implement the default plugin with a block links?
thanks

@angela
It is very complicated to block link and identify if link is bad, i.e. link to google is not bad...