‘Barracuda Free Public RBL’.
'The BRBL is open to public and can be used within reason. Barracuda is
currently making this service available free of charge and we hope to
keep it that way. Barracuda Networks does require free registration to
gain access to the DNSBL. […]
Registration is simple and immediate. Please note that this service is
provided free of charge, therefore Barracuda Networks reserves the right
to refuse service to spammers, competitors and other parties at the
company’s discretion. This service is provided as is with no warrantee
of any kind.’
http://www.barracudacentral.org/rbl
สำหรับคนที่ใช้ SpamAssassin ก็เำิพิ่ม rule นี้ไป แล้วก็ปรับ score ตามสะดวก
ifplugin Mail::SpamAssassin::Plugin::DNSEval
header __RCVD_IN_BRBL