shared or reseller hosting

[michael_s]

I've seen the recent posts about preferred web hosting providers. What about reseller hosting? At least I think that's what I need. I'd like to host a client's three sites, which I can do on my shared account at bluehost as subdomains. (i know some here don't like bluehost, but I've been there forever. Maybe it's time to change.)
But... I want them to be able to set up and manage their own email accounts for these particular domains. Which I can't do at bluehost. They see every email associated with the main domain. (mine)

Options?

Thanks