Social Build can setup Google Apps for your business, with your domain.
Google Apps is more than just an email system, it has many tools/apps, to be able to enable collaboration across your business user base.
If you use my Google Apps referral link. You get 10% off your first years invoices from Google.
Social Build can migrate your mail from your existing mail provider.
If you would like to discuss your requirements or require any further information, then please don't hesitate to contact Social Build. Skype or Google Hangout sessions can be arranged to demo software.