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so according to this: http://www.smartertools.com/smartermail/pricing.aspx
you can sign up for a free account. the chart indicates you must select enterprise.
so I go here: https://www.smartertools.com/purchase/add-product.aspx?
select 'SmarterMail Enterprise Edition'
and... there is nothing that indicates "free" on the next page. in fact, the minimum seems to be 250 Mailboxes!
so.. where or how exactly do i sign up for a free account? :(