The Session Initiation Protocol (SIP) and Spam

Document Type Expired Internet-Draft (individual)
Last updated 2004-10-28
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Spam, defined as the transmission of bulk unsolicited messages, has plagued Internet email. Unfortunately, spam is not limited to email. It can affect any system that enables user to user communications. The Session Initiation Protocol (SIP) defines a system for user to user multimedia communications. Therefore, it is susceptible to spam, just as email is. In this document, we analyze the problem of spam in SIP. We first identify the ways in which the problem is the same and the ways in which it is different from email. We then examine the various possible solutions that have been discussed for email and consider their applicability to SIP. Discussions on this draft should be directed at


Jonathan Rosenberg (
Cullen Jennings (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)