I really think a prefix would be the solution. You could set up a rule to dump the campus-wide messages if you wanted to-- and it would make it easier to find a campus-wide message in your mailbox if you wanted to. On the other hand, rumor has it that there is a technological issue with making that happen...
(I believe we are still limited to sending one campus-wide email per event, which means I don't find out about events I might enjoy until the day of or the day before, when it's too late to make arrangements to go.)
It would be helpful, however, if Drew people could post things on the events calendar and perhaps here on community as well as sending out a message the day before! I know the events calendar people would LOVE to see more events posted.)
"Comment is free, but facts are on expenses." - Tom Stoppard