Sorbs (; ; also known as Wends, Lusatian Sorbs or Lusatian Serbs) are a Western Slavic people of Central Europe living predominantly in Lusatia, a region on the territory of Germany and Poland. In Germany they live in the states of Brandenburg and Saxony. They traditionally speak the Sorbian languages (Wendish, Lusatian) – closely related to Polish and Czech – officially recognized and protected as a minority language of Germany. Due to a gradual and increasing assimilation between the 17th and 20th centuries, virtually all Sorbs also spoke German by the late 19th century and many of the descendants of Sorbs no longer speak the Sorbian languages. They are predominantly Roman Catholics and Lutherans.

SORBS (Spam and Open Relay Blocking System) is a list of e-mail servers suspected of sending or relaying spam (a DNS Blackhole List). It has been augmented with complementary lists that include various other classes of hosts, allowing for customized email rejection by its users.