Blacklist domains/mail addresses in SpamAssassin Edit /etc/spamassassin/v320.pre Uncomment the Shortcircuit line to enable it: loadplugin Mail::SpamAssassin::Plugin::Shortcircuit Edit /etc/spamassassin/local.cf Add these lines to local.cf file: ifplugin Mail::SpamAssassin::Plugin::Shortcircuit shortcircuit USER_IN_BLACKLIST on shortcircuit USER_IN_BLACKLIST_TO on shortcircuit SUBJECT_IN_BLACKLIST on endif # Mail::SpamAssassin::Plugin::Shortcircuit Include your blacklist file into local.cf: include /etc/spamassassin/blacklist.cf Edit /etc/spamassassin/blacklist.cf Add this line to block all emails from domain.com blacklist_from *@domain.com Add this line to block addr@domain2.com blacklist_from addr@domain2.com You can add multiple domains and email accounts to block them. Reload amavis service amavis force-reload