blcheck

A powerful script for testing a domain or an IP against mailing black lists.
Script will use dig if it is found. If dig is not found script will use host.

Features

More then 100 black lists already included!
Automatic distinction between domain or IP
Performs PTR validation (only if domain is supplied, does not work for IP)
3 verbose (-v) levels and a quiet (-q) mode
The result of script is the number of servers which blacklisted the domain, so it can be used for any kind of automated scripts or cronjobs
Informative and pleasant output

Requirements

Any Unix/Linux with POSIX shell.
Either dig or host command available.

Usage

blcheck [options] <domain_or_IP>

Supplied domain must be full qualified domain name.
If the IP is supplied, the PTR check cannot be executed and will be skipped.

-l file Load blacklists from file, separated by space or new line
-c Warn if the top level domain of the blacklist has expired
-v Verbose mode, can be used multiple times (up to -vvv)
-q Quiet modem with absolutely no output (useful for scripts)
-p Plain text output (no coloring, no interactive status)
-h The help you are just reading

Result of the script is the number of blacklisted entries. So if the supplied IP is not blacklisted on any of the servers the result is 0.

TODO

Handle domains with multiple DNS entries.

Credits