A: Hello BriTand

1 - The firewall feature "cloud firewall" blocks known spammer IPs from visiting the website - Also, all form and registration submissions are checked for suspicious content, but the plugin does not add any specific anti-spam prevention.

2 - Are you thinking of blocking specific email addresses for registration? We do not have that feature, but we have added it to the roadmap here: https://securityninja.productlift.dev/p/block-email-addresses-from-registration-TCmKym

In terms of .ru and .cn, no - there is nothing in terms of blocking email addresses, at least not yet, but you are able to use the country blocking feature of the plugin which means you can block certain countries as needed.