first launch open the "Add account" window instantly
username = email address?
one account = change view to the client inbox rather than the "accounts" view?
The "address book" button doesn't work: says I need to be composing an email in order to add a recipient - despite being on the compose screen
thought about offering push notification for $n/month? I'd pay $1/month for it.
you need a website to pitch mailroom to users :)