SpamCop FAQ : SpamCop Blocking List information : How do I configure my mailserver to reject mail based on the blocklist? :
To enable the use of DNSBL and the SpamCop Blocking List in Communicate Pro for Linux, simply:

1. Go into "Settings, Protection, Blocklisted IP Addresses"
2. Add "bl.spamcop.net" into the form field, under "Use Blocklisting DNS Servers (RBLs)"
3. Click Update
4. Check the box which says "Use Blocklisting DNS Servers (RBLs)"
5. Click Update

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