An employee was upgraded from 2003 to 2010 and noticed an increase in the amount of undeliverable e-mail notices she was receiving. These seemed to all stem from out of office messages that she'd sent out.
Here's the typical situation
1. Employee receives e-mail from a mailing lists
2. Employee's out of office responds
3. E-mail bounces around in the mailing list originator's e-mail server for 4-5 days
4. Employee receives an undeliverable e-mail message notice
Our employee doesn't think that she received that many of these when she was on 2003. Is the behavior slightly different in 2003?