Determine SMTP roundtrip via PowerShell

Here is another small script from the Quick and Dirty series. The script was actually created to monitor an AntiSPAM gateway, which was often overloaded and no longer processed any mails. Unfortunately, "text-only" mails without hyperlinks or other content turned out to be not very meaningful, as they were practically always processed. The script was supposed to sound the alarm if the mails were stuck in the AntiSPAM gateway for longer than a certain time, i.e. to measure the SMTP roundtrip. However, it was never used in this way. So here is a slightly modified version to at least measure the time a mail takes from sending to receiving. The script can be executed in the Exchange Management Shell:

If you can use it, you can also customize it a little, for example to sound an alarm if no more mails arrive or can be sent.

Simply copy the following script into a PS1 file and adapt the first 3 lines accordingly:

$recipient = "frank@frankysweb.de"
$smtpserver = "smtp.frankysweb.local"
$sleep = 15
write-host ""
$start = (get-date).AddMinutes(-20)
$end = (get-date).AddMinutes(+20)
$subject = get-random
write-host "Sendig Testmail with Subject: $subject"
$sendtime = get-date
Send-MailMessage -SmtpServer $smtpserver -From $recipient -To echo@tu-berlin.de -Subject $subject -Body $subject
write-host "Waiting $sleep Seconds"
sleep -seconds $sleep
write-host "Getting Message Tracking Logs"
try
{
$tracking = Get-TransportServer | Get-MessageTrackingLog -EventId RECEIVE -Recipients $recipient -start $start -end $end | where {$_.messagesubject -match "$subject"} | select timestamp,MessageSubject
}
catch
{
}
write-host ""
write-host "Results:"
write-host ""
if ($tracking)
{
$receivetime = $tracking.TimeStamp
$roundtrip = ($receivetime - $sendtime).totalseconds
$roundtrip = [math]::Round($roundtrip,2)
write-host "Found Message with Subject: $subject" -foregroundcolor green
write-host "SMTP Roundtrip: $roundtrip Seconds" -foregroundcolor green
}
else
{
write-host "Message with Subject not found: $subject" -foregroundcolor red
write-host "Roundtrip TimeOut"
}

"Sleep" specifies the time in seconds that is waited before the message tracking logs are searched for the sent mail.