Fact is, a few people delete old e-mails. Like other things you don’t need it just accumulates and accumulates and gathers binary dust.
As in other similar cases, scripting can really help. Glen Scales wrote a nice one that generates a useful HTML report for you, similar to the mailbox list in ESM, but with age reporting.
For more information:
http://gsexdev.blogspot.com/2006/11/reporting-on-a…x.html
download the script: