> Limiting their pop3 maximun storing account, i think all was good.
> Any ideas?
You could use the quota mechanism (if there is any) of your operating
system. This has the disadvantage of rejecting mails when the limit is
reached.
I prefer to run a cleaning job that deletes mail older than a policy
defined maximum if a policy defined maximum of space is allocated.
This way the user is allowed to exceed the limit for a defined amount of
time and mails are normally not bounced.
The user should get a summary about deleted mails - these summaries should
never be deleted.
Regards, Frank