i think check_dig might start things off ... you can ask a name server for an MX record and specify what you expect in the answer section with the -a flag: check_dig -H SERVER -l <a href="http://cnn.com">cnn.com</a> -T mx -a <a href="http://nycmail1.turner.com">nycmail1.turner.com</a> so this would expect the string "<a href="http://nycmail1.turner.com">nycmail1.turner.com</a>" to be in the answer section ... but i can only see how to get the lowest MX record with check_dig so seeing higher MX may require a little extra work ... <div>On 7/27/07, Rogelio Bastardo <<a href="mailto:scubacuda@gmail.com">scubacuda@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">On various DNS servers, I'd like to make sure that a certain A records remains the 10 record (or, at least, the first deliverable mail server), and then alert me when that changes. Any idea how to do this with Nagios? From what I can tell, the check_dns plugin does not have this functionality. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> <a href="http://get.splunk.com/">http://get.splunk.com/</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net"> Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </blockquote></div>