I've looked high and low and found nothing relating to this issue I'm having, so I apologize if it's already been asked and answered because I can't find it.
SPECS:
Plesk Panel, 11.0.9, #61, Windows 2008 R2 SP1, x64
PROBLEM:
With reports configured to send out to an email address local...
RE: 500 Errors
make or modify your web.config file in the httpdocs folder of the site having the issue..
add this code: (if you already have the system.webServer wrapper, don't duplicate it, just put the inner lines)
<system.webServer>
<asp scriptErrorSentToBrowser="true"/>...