:Spam Prevention Early Warning System

{{Short description|Former online service}}

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{{primary sources|date=September 2018}}

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The Spam Prevention Early Warning System (SPEWS) was an anonymous service that maintained a list of IP address ranges belonging to internet service providers (ISPs) that host spammers and show little action to prevent their abuse of other networks' resources. It could be used by Internet sites as an additional source of information about the senders of unsolicited bulk email, better known as spam.

The SPEWS database has not been updated since August 24, 2006; dnsbl.com lists its status as dead.[https://www.dnsbl.com/2007/01/spews-current-status.html DNSBL lists SPEWS database status as dead] A successor, the Anonymous Postmaster Early Warning System (APEWS), appeared in January 2007,[http://groups.google.com/group/news.admin.net-abuse.blocklisting/msg/b3da24209d8d5319 APEWS announcement of SPEWS replacement] using similar listing criteria and a nearly identical web page.