Block spam with RBL

These files are used to manually block spammers, ignore certain domains or incoming hosts.


Create three text files in the /etc directory:
/etc/rblblacklist
/etc/rblbypass
/etc/rblwhitelist

touch /etc/rblblacklist; touch /etc/rblbypass; touch /etc/rblwhitelist

Examples with sample data:
/etc/rblblacklist
Is a manual blacklist, it rejects specific spammer hosts BEFORE they can send more email to your server:
domain1.com
domain2.com
domain3.com

/etc/rblbypass
Bypasses RBL email testing for specific destination (local) domains that don't want RBL filtering or prefer SpamAssassin tagging:
domain1.com
domain2.com
domain3.com

/etc/rblwhitelist
Blocks RBL email testing for listed incoming hosts, (wildcards allowed), in case an important client's mailserver is listed on an RBL you use, also automatically excludes relayhosts:
mail.domain1.com
*.domain2.com
*.domain3.com