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.

• 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

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

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.

-d dnshost  Use host as DNS server to make lookups
-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.

1. Handle domains with multiple DNS entries.

MIT License

Copyright (c) 2018 Intellex

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Script has been written by the Intellex team. Contributors: Darko Poljak