This article describes how to include a screenshot image in an email.
Web Performance Monitor (WPM) 2.2 and earlier.
<a href="http://(enter primary web server address)/${ScreenshotUrl}"><img src="http://(enter primary web server address)/${ScreenshotUrl}" alt="Screenshot" width="640" height="480">
NOTE: If there is an issue with receiving screenshots after this, try adding a 1-minute delay before sending the email.