you can let the End of Session Notification execute a script on Cellserver that'll do what you want.
A quick and dirty Script may look like this:
rm /tmp/out.txt
cat >> /tmp/out.txt #the content of the normal Notification
omnidb -sess $SESSIONID -report >> /tmp/out.txt #all Session Messages of the Job
cat /tmp/out.txt | mailx where_ever@to.com