Possibly overkill, but if clients are concerned about deciding who gets the email they could use something like RT (or a more user-friendly alternative :). I'm

Possibly overkill, but if clients are concerned about deciding who gets the email they could use something like RT (or a more user-friendly alternative :). I'm sure with a few clever hacks you could probably route anything mentioning 'accounts', 'invoices' etc. to the accounts department automatically, and anything which isn't caught can be quickly sent to the correct department.