NAME

       "check_rbl" - Check SMTP black- or white- listing status

DESCRIPTION

       check_rbl is a Nagios plugin to check SMTP black- or white- listing status

VERSION

       Version 1.7.0

SYNOPSIS

       check_rbl -H hostname --server servername [options]

REQUIRED ARGUMENTS

         -H, --host=STRING    SMTP server to check. If hostname is given, it will be resolved to its IP first.
         -s, --server=STRING  RBL server (may be repeated)

OPTIONS

        -?, --usage
          Print usage information
        -h, --help
          Print detailed help screen
        -V, --version
          Print version information
        --extra-opts=[section][@file]
          Read options from an ini file. See https://www.monitoring-plugins.org/doc/extra-opts.html
          for usage and examples.
        -c, --critical=INTEGER
          Number of blacklisting servers for a critical warning
        -w, --warning=INTEGER
          Number of blacklisting servers for a warning
        -d, --debug
          Prints debugging information
        -U, --url=STRING
          URL to check. Will be ignored if host is set.
        -r, --retry=INTEGER
          Number of times to try a DNS query (default is 4)
        --workers=INTEGER
          Number of parallel checks
        --whitelistings, --wl
          Check whitelistings instead of blacklistings
        --query-timeout=INTEGER
          Timeout of the RBL queries
        -a, --append=STRING
          Append string at the end of the plugin output
        -n, --nameserver=STRING
          Use this nameserver IP as DNS resolver (only one server is supported)
        -t, --timeout=INTEGER
          Seconds before plugin times out (default: 15)
        -v, --verbose
          Show details for command-line debugging (can repeat up to 3 times)

EXAMPLE

         check_rbl -t 30 -H matteocorti.ch -s zen.spamhaus.org -s bl.spamcop.net

DIAGNOSTICS

       You can specify multiple --verbose options to increase the program verbosity. --debug can
       be used to display the process and internals of the querying mechanism.

EXIT STATUS

       0 if OK, 1 in case of a warning, 2 in case of a critical status and 3 in case of an
       unknown problem

DEPENDENCIES

       check_updates depends on

       •   Capture::Tiny

       •   Data::Validate::Domain

       •   Data::Validate::IP

       •   Getopt::Long

       •   IO::Select

       •   Monitoring::Plugin

       •   Monitoring::Plugin::Threshold

       •   Net::DNS

       •   Readonly

CONFIGURATION

       Options can be specified in an ini file. See
       https://www.monitoring-plugins.org/doc/extra-opts.html

INCOMPATIBILITIES

       None reported.

SEE ALSO

       Nagios documentation

BUGS AND LIMITATIONS

       No bugs have been reported.

       Please report any bugs or feature requests through the web interface at
       https://github.com/matteocorti/check_rbl/issues

AUTHOR

       Matteo Corti <matteo@corti.li> See AUTHORS for the complete list

LICENSE AND COPYRIGHT

       Copyright (c) 2009-2022 Matteo Corti <matteo@corti.li>

       Copyright (c) 2009 ETH Zurich.

       Copyright (c) 2010 Elan Ruusamae <glen@delfi.ee>.

       Copyright (c) 2022 Claudio Kuenzler <ck@claudiokuenzler.com>.

       This module is free software; you can redistribute it and/or modify it under the terms of
       GNU general public license (gpl) version 3.  See the LICENSE file for details.

DISCLAIMER OF WARRANTY

       BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE,
       TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE
       COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF
       ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
       WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
       THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE
       DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

       IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT
       HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY
       THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
       INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
       SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
       LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY
       OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
       SUCH DAMAGES.

ACKNOWLEDGMENTS

       Elan Ruusamäe for the improved parallel support and several fixes

       Victor V Kudlak for parallel support

       Jan Kantert for whitelistings support