#112119. URIBL.COM - Realtime URI Blacklist URIBL.COM is a Realtime URI Blacklist (RHSBL) served via DNS to identify Unsolicitied Bulk and Commercial Email (UCE/UBE) based on the links within the email. URIBL.COM is enabled by default in the popular opensource SpamAssassin. Uribl.com~Site InfoWhoisTrace RouteRBL Check