SORBS Open SOCKS Proxies identified this IP address or domain as sending spam.
This could be because of a virus, bad software, or misconfigured mail server. SORBS Open SOCKS Proxies thinks spam senders should be stopped, but safe IPs and domains should be allowed.
You can learn more about SORBS Open SOCKS Proxies delisting by visiting their website: http://www.sorbs.net/lookup.shtml