SpamCop FAQ : SpamCop Blocking List information : How do I configure my mailserver to reject mail based on the blocklist? :

Exchange 2003 no longer needs third party software to link into DNS-based blacklists. Older versions of Exchange require a free plugin.

Martijn Jongen has provided a plugin for Exchange: ORFilter

GFI MailSecurity is another option for Exchange users.

Vamsoft Open Relay Filter is another commercial option for Exchange 2000 users.

(Third party software is not supported by SpamCop)

For Exchange 2003:

Make sure you install SP2 first, as it contains some important updates for Intelligent Message Filtering.

• Display Name: spamcop
• DNS Suffix: bl.spamcop.net