So if you don’t know about it or are looking for something, PRTG is a great and powerful network monitoring tool. I’d recommend checking it out. There’s a free trial and you can start getting details of your network in just a few short minutes thanks to their super easy setup and configuration. Now I’m not going to review PRTG because I’m sure there’s plenty of reviews already out there, but simply put they have built-in monitors/sensors that are preconfigured for what you want to monitor. Should these built-in sensors not be adequate, they have the custom external sensor. Basically, this custom sensor allows you to use your own application or script to return text or XML data back to PRTG to log and report on. That’s what this is about. A script that will monitor Exchange 2010’s transport queue and output the results to XML and set a warning based on the total count of emails in the queue. You can setup your own alerting of this sensor to email you when the “queue fills up”.