RBLCheck will check if one or more of your IP address / domains exists in the well-known Realtime Blackhole Lists (RBL). It can automatically start up with Windows and perform a routine check in the background.

Features:
- Perform RBL lookups on multiple domains.
- Load with Windows and automatically perform a routine check.
- Use a custom DNS server.

Platforms: Win98 , WinME , WinNT 4.x , Windows2000 , WinXP

System requirements: Windows 98 or better.