SpamCop is a free spam reporting service, allowing recipients of unsolicite bulk email (UBE) and unsolicited commercial email (UCE) to report offenses to the senders' Internet Service Providers (ISPs), and sometimes their web hosts. SpamCop uses these reports to compile a DNSBL of computers sending spam called the "SpamCop Blocking List", (SCBL) and websites referenced in the spam are used to create the Spam URI Realtime Blocklists (SURBL) RHSBL.