If you run a blog you are probably one of the people that is affected by SPAM originating in servers from a company called ubiquityservers. If you google it you will find hundreds of complaints and unfortunately it seems that people at ubiquityservers will always look the other way regarding this issue.
I have searched for all the subnets registered by ubiquityservers and here it is the results. Just open your .htaccess and add this information to it:
order deny,allow
deny from 70.32.32.0-70.32.32.255
deny from 69.147.236.0-69.147.236.255
deny from 64.120.2.0-64.120.2.255
deny from 173.208.32.0-173.208.39.255
deny from 64.120.16.0-64.120.19.255
deny from 173.234.12.0-173.234.15.255
deny from 23.19.32.0-23.19.35.255
deny from 173.234.88.0-173.234.89.255
deny from 108.62.56.0-108.62.63.255
deny from 173.234.80.0-173.234.83.255
deny from 23.19.168.0-23.19.171.255
deny from 70.32.34.0-70.32.34.255
deny from 174.34.151.0-174.34.151.255
deny from 174.34.144.0-174.34.145.255
deny from 173.234.180.0-173.234.183.255
deny from 64.120.4.0-64.120.7.255
deny from 173.234.188.0-173.234.188.255
deny from 108.62.192.0-108.62.195.255
deny from 108.62.152.0-108.62.159.255
deny from 23.19.80.0-23.19.83.255
deny from 23.19.84.0-23.19.87.255
deny from 108.62.200.0-108.62.203.255
deny from 108.62.252.0-108.62.255.255
deny from 23.19.124.0-23.19.127.255
deny from 23.19.128.0-23.19.131.255
deny from 23.19.248.0-23.19.251.255
deny from 23.19.184.0-23.19.187.255
deny from 23.19.216.0-23.19.219.255# Servers @ Nobis (related to UbiquityServers)
deny from 70.32.32.0-70.32.47.255
deny from 67.201.48.0-67.201.49.255
deny from 72.37.145.0-72.37.145.255
deny from 173.208.0.0-173.208.127.255
deny from 69.174.60.0-69.174.63.255
deny from 174.34.128.0-174.34.191.255
deny from 173.234.0.0-173.234.255.255
deny from 108.62.0.0-108.62.255.255
deny from 72.37.224.0-72.37.231.255
deny from 23.19.0.0-23.19.255.255
deny from 72.37.237.0-72.37.237.255
deny from 72.37.218.0-72.37.219.255
deny from 72.37.222.0-72.37.223.255
deny from 72.37.221.0-72.37.221.255
deny from 67.201.0.0-67.201.7.255
deny from 72.37.242.0-72.37.243.255
deny from 67.201.40.0-67.201.40.255
deny from 72.37.246.0-72.37.247.255
deny from 216.6.224.0-216.6.239.255
deny from 72.37.204.0-72.37.204.255
deny from 69.147.224.0-69.147.255.255
deny from 64.120.0.0-64.120.127.255allow from all
You can check it one by one to confirm, but these are all OK. Say goodby to UbiquitySpam 🙂