=Checking for blacklisting = If we are checking for black listing / being listed as a spammer then there are a number of tools we can use. * http://multirbl.valli.org/ This meta checking tools, checks numbers of RBL lists to see is the IP blacklisted. * http://whatismyipaddress.com/ip-lookup Another useful tool. When you have an IP you want to know more information about, just put it in here. = Conclusion ==