Hi Torsten,
your plugin works well, but to prevent from this SPAM, I need an option to block the X11 user agents:
All SPAM comes from this X11 Linux user agents.
User IP: 157.52.252.74
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.234.212.134
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.239.124.88
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.148.5.87
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 45.61.118.130
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 196.242.21.150
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 64.64.110.74
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User IP: 206.206.73.198
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User IP: 147.185.250.233
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User IP: 23.247.105.172
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User IP: 196.196.254.146
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 OPR/89.0.4447.51
User IP: 206.206.71.127
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36
User IP: 184.174.56.252
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36
User IP: 161.123.115.193
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36
User IP: 104.232.209.242
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36
User IP: 45.127.250.240
User Agent: Mozilla/5.0 (X11; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 206.206.73.198
User Agent: Mozilla/5.0 (X11; Linux i686; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.239.80.52
User Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Vivaldi/5.3.2679.68
User IP: 142.147.132.46
User Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Vivaldi/5.3.2679.68
User IP: 45.133.4.42
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.233.26.71
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 216.173.98.182
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 104.239.52.135
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
User IP: 45.43.65.32
User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:114.0) Gecko/20100101 Firefox/114.0
Thanks Armin