This plugin allows virus scanning with ESET Mail Security for Linux/BSD.
Install the software as per the intructions from ESET and enable this plugin and it will scan each message using the "esets_cli" command which defaults to /opt/eset/esets/bin/esets_cli.
cp node_modules/haraka-plugin-esets/config/esets.ini config/esets.ini
$EDITOR config/esets.ini