how to monitor,or be notified of email blacklisting ?

[Markus Schönhaber]

12.03.2010 13:20, Rudi Ahlers:

> Does anyone know how I can monitor our server's for blacklisting? We
> run a large amount of shared hosting & reseller hosting servers and
> from time to time one of the IP's will get blacklisted. I'm looking
> for a way to be notified if any of our IP's get blacklisted. Is this
> possible?

Of course that's possible.
Among the possibilities are:
- Creating a script that checks your IP(s) against the relevant
  blacklists and run it regularly (by cron, for example).
- Creating a plugin for the monitoring software of your choice
  (or using an existing one) and let that do the check.

Take a look here
http://www.heise.de/netze/artikel/Verdrehte-Abfrage-223890.html
for a standalone shell script and here
http://www.heise.de/netze/artikel/Nagios-Plugin-223892.html
for a nagios plugin (which I use BTW).
The article itself is in German but the script and the plugin should be
understandable nevertheless.

-- 
Regards
  mks