Spam and Open Relay Blocking System

"SORBS" redirects here. For other uses, see Sorbs (disambiguation).

The Spam and Open Relay Blocking System
Company typePublic
FoundedQueensland, Australia 2001 (2001)
FounderMichelle Sullivan
HeadquartersSunnyvale CA, United States of America
Area served
Worldwide
Key people
Michelle Sullivan
OwnerProofpoint, Inc.
Websitewww.sorbs.net
Footnotes / references
SORBS is owned by Proofpoint, Inc.

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