My COO just asked a question, after an employee sent a farewell email to all employees (all 53) by using an "everyone" distribution list in our exchange 5.5 directory. His question (and now mine) is, is there a way to regulate emails sent internally? The concern is, if this employee had sent a malicious email (instead of the pleasant one) would there be any way to regulate it? I know it is a difficult question, with probably no real solution, but I thought I would ask.
Single Exchange 5.5 server
Single subnet domain