Multi-RBL Check

This site has an awesome list of RBL (Email black lists) that you can check an IP against and get results. It also does it via AJAX so live status updates. (Supports IPv6)

http://multirbl.valli.org/

Comments

[Damien Rame]

You can also run a complete Spam Blacklist/DNSBL test on http://www.EmailSecurityGrader.com – it has an extensive number of RBL (40+) and also includes several other email security tests (SPF, Open relay, Authentication) which noawadays are all pretty important to avoid spam, spoofing, relaying, blacklisting.