# Test SMTP QUEUE ON EXCHANGE 2010
# 
# This script will execute the "Get-queue" command and look for how much e-mail are in the queue
# 
# Example:
# Identity                                                                   DeliveryType Status MessageCount NextHopDomain
# --------                                                                   ------------ ------ ------------ -------------
# SERVER\173821                                                              MapiDelivery Ready  0            db01
# SERVER\173832                                                              MapiDelivery Ready  0            db04
# SERVER\173833                                                              SmartHost... Ready  0            [192.17.70.131],[192.17.70.132]
# SERVER\173834                                                              MapiDelivery Ready  0            db02
# SERVER\Submission                                                          Undefined    Ready  0            Submission
# SERVER\Unreachable                                                         Unreachable  Ready  5            Unreachable Domain
# SERVER\Shadow\173808                                                       ShadowRed... Ready  1            EXTERNAL.domain.dom
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
#
# Revision History
# 2014-08-07	Roberto C. [robertocaramia@hotmail.com]	1.0 code initial created
# Thanks to Bastian W. (Bastian@gmx-ist-cool.de) for the plugin schema					
#
#
# To execute from within NSClient++
# [/settings/external scripts]
# allow arguments = true
#
# [/settings/external scripts/wrapped scripts]
# alias_check_queue = NagiosMonitoring_Exchange-queue.ps1 $ARG1$ $ARG2$ $ARG3$
# On the check_nrpe command include the -t 60, since it takes some time to load
# the Exchange cmdlet's.
# Check command on Nagios machine
# /usr/lib/nagios/plugins/check_nrpe -H $HOSTADDRESS$ -t 60 -c alias_check_queue -a $ARG1$ $ARG2$ $ARG3$

#Parameters that you have to set for the check
#$server is the fqdn of the CAS to check ($ARG1$)
#$critical is the threshold you think is critical ($ARG2$)
#$warning is the threshold you think is warning ($ARG3$)

param($server="",$critical="",$warning="")

#Check if the param are set
if($server -eq "" -or $critical -eq "" -or $warning -eq "")
{
  
    Write-Output "WARNING"
    Write-Output "You have to set the CAS-SERVER, the CRITICAL threshold, and WARNING threshold"
    exit
}

#Check and load Exchange Management PowerShell
 
if ( (Get-PSSnapin -Name Microsoft.Exchange.Management.PowerShell.E2010 -ErrorAction:SilentlyContinue) -eq $null)
{
    Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010
}


$NagiosStatus = "0"
$NagiosDescription = ""

ForEach ($Type in Get-Queue -Server $server )
{

 	
	if ($Type.MessageCount -gt "$critical") 
	{
	# Look for threshold critical
	
		
		if ($NagiosDescription -ne "") 
		{
			# Format the output for Nagios
			$NagiosDescription = $NagiosDescription + ", "
		}
		
		$NagiosDescription = $NagiosDescription + $Type.Identity + " = " + $Type.MessageCount
		
		# Set the status to failed.
		$NagiosStatus = "2"
		
	}

	if ($Type.MessageCount -gt "$warning") 
	{
	# Look for threshold warning
	
		
		if ($NagiosDescription -ne "") 
		{
			# Format the output for Nagios
			$NagiosDescription = $NagiosDescription + ", "
		}
		
		$NagiosDescription = $NagiosDescription + $Type.Identity + " = " + $Type.MessageCount
		
		# Set the status to WARNING.
		$NagiosStatus = "1"
		
	}
}

# Output, which string should we write to Nagios?
if ($NagiosStatus -eq "2") 
{
	Write-Host "CRITICAL:"$NagiosDescription
} 
elseif ($NagiosStatus -eq "1") 
{
	Write-Host "WARNING:"$NagiosDescription
} 
else 
{
	Write-Host "OK: all e-mail are gone!"
}

exit $NagiosStatus