rbl (4 products)

BlackMail 1.0.0 (Freeware)

Delete SPAM using a domain blacklist. Automatically extract domains from emails and add them to a blacklist.

Nsauditor 1.0.2.0 (Shareware, $37.00)

Nsauditor is a network security auditing system capable of performing real-time traffic and protocol analysis, showing detailed listings of all TCP and UDP endpoints on your system, including the owning process name, loaded modules, kernel objects, memory details, remote address and state of TCP connections,host dns name,contry were from,network class type,service assoccieted with connection,possible trojans assoccieted with port and service.

Open Relay Filter Enterprise Edition 1.5 (Commercial, $99)

ORF Enterprise Edition is an enterprise-level anti-spam solution that helps you to block spam before it reaches your network. It wedges into the SMTP conversations and monitors all incoming SMTP traffic.

RelayTest 1.9.2 (Shareware, $35.00)

RelayTest Pro is a tool for network administrators, that allows to test a specified mail server for open relays. It runs series of tests designed to detect open relays and create a detailed report of the findings. The test data can be automatically updated from the web to catch-up with the latest tricks used by spammers.