Spamhaus Benefits

Spamhaus is widely regarded as Best-In-Class, used by thousands of organizations worldwide.

Approximately 90% of all junk email is rejected before entering your network.
By refusing messages whose sender's IP address is on the block lists, your email system will not process these messages and therefore a) will not be liable for delivery or forwarding of spam, and b) not utilize your infrastructure and resources.
Protects the reputation of your organization by reducing the risks of your servers being blacklisted or throttled because of spam forwarded through email accounts hosted by you.
Dramatically improved delivery times.
Lowest "false positive" rate.
Successfully deployed by thousands of organizations worldwide.

Quick DNSBL Stats
21 Days	103060 spams	1983 hams
DNSBL Zone	Accuracy (against spam)	Inaccuracy (against non-spam)
zen.spamhaus.org	90 %	0 %
bl.spamcop.net	62 %	0 %
psbl.surriel.com	49 %	1 %
l2.apews.org	86 %	17 %
blackholes.five-ten-sg.com	32 %	38 %
Source: stats.dnsbl.com

Spamhaus is Defined as 'Best Practices'

Most large organizations define the use of reputation services (aka blacklists) as a first stage filter, to improve the effectiveness and performance of your email infrastructure. By deploying a first stage spamfilter, organizations prevent 90% of spam from entering the network, blocking 90% of this unwanted traffic at SMTP connect time. This provides dramatic improvements by reducing traffic loads, reducing required server / infrastructure / administration costs, and improving the performance of your critical email system. See the Whitepaper, How Spamhaus Cost Effectively Eliminates Spam.

About Spamhaus

Spamhaus is an international non-profit organization based in the UK whose mission is to track the Internet's Spam Gangs, to provide dependable real-time anti-spam protection for Internet networks, work with law enforcement agencies to identify and pursue spammers worldwide. For more information, visit http://www.spamhaus.org.