The Blacklist Lookup Tool is a Free SEO Tool allows to check if your IP's have been black listed by querying over 100 known public DNS blacklists. Enter the IP address, a hostname or domain name to lookup and you can use our Multi-RBL to check whether your IP address is listed within the main RBLs.
The checker queries the major DNS Blacklists-Sorbs, Spamhaus, NJABL, DSBL, CBL, and PSBL for unique IP address or hostname,and returns if it is blacklisted for spam distribution, as an open proxy relay, or for other potentially malicious activities.
Each database has its own blacklisting requirements for IP addresses and compiles its own list of offenders. If your IP address is blacklisted and you want to inquire, you will need to visit the website of the blacklist and check your IP address. Most blacklist databases may offer general reasons for banning, but do not mention individual email addresses linked to blacklisted IP addresses.
It is easier to change the specification to fit the program than vice versa.Alan Perlis