I dont have a 6.1 to test on. I know that it has worked in my lab since 5.2. I would just double check the setting.
I did a quick test on my lab 6.2.2
Policy Manager Server Source Level Category Action Timestamp
cplab.clearpassdemo.com (10.80.2xx.xxx Admin UI INFO Logged in None Oct 16, 2013 00:51:24 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) Admin UI WARN Login Failed None Oct 16, 2013 00:51:18 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) Admin UI INFO Logged out None Oct 16, 2013 00:51:13 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) Admin UI INFO Logged in None Oct 16, 2013 00:49:07 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) ClearPass Updater INFO AV/AS Updates Success Oct 16, 2013 00:39:06 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) Admin UI INFO Logged in None Oct 15, 2013 23:16:32 CDT
cplab.clearpassdemo.com (10.80.2xx.xxx) ClearPass Updater INFO AV/AS Updates Success Oct 15, 2013 23:16:07 CDT
You will see an event in the event viewer if the email was sent.
I have a test account with gmail that I use along with my own exchange.