[catch23]

I guess you'll have to find a new place for email when your business grows beyond 10,000 employees...

When you have 10,000 employees, you could probably just get a team to author their own version of gmail.

[tlack]

Are you talking about the limits in the linked article? It's 10,000 contacts in the address book that are limited, not total employees - though that is probably limited too.