Lunarpages, within our rights to protect our servers from exploitation will block IPs, and use Relay Block lists, in accordance with spam prevention, and keeping server stability in mind. We have been receiving numerous dictionary attacks
recently, and this is the best way to help prevent them.Definition
Dictionary attacks fill the server with 1000s upon 1000s of mail/spam etc, which then cause the server to require a reboot or worse in some cases is possible.
If your IP has been listed in such a list, you would need to contact your ISP in that case, to advise them of the current situation. We use these lists to protect our servers from spammers, and exploit attempts.
This is not meant to hinder you from sending mail to your friends, family or business contacts. That is the last thing we'd want to do. However, if the IP you connect from to the server is listed in such a block list, you need to deal with that through your ISP.
In the same respect, if someone has been spamming the server(s) from an IP, and they are a frequent vistor to your site(s) and it is determined that they are causing a problem on the server with excessive connections, or attempts to compromise the server(s) we have no choice but to block them as well. Which in turn prevents them from visiting your site, or any other site on that particular server, and in some extreme cases the entire Lunarpages farm.
None of this is meant to upset, deter or prevent you or your customers from having a suitable experience with web and or email services, however when server stability and/or exploit/spam attempts become rampant we have no choice.
There are many block lists, and many Hosts use these.
you can check your IP here against a number of rbl's, and spam notice lists:http://rbls.orghttp://spamhaus.orghttp://spamcop.nethttp://ordb.orghttp://www.dnsstuff.com/tools/ip4r.ch?ip=http://www.dnsbl.us.sorbs.net/
There are many more.
Another Useful link is:http://www.spamfaq.net/