Dev Guy can setup Google G Suite for your business, with your domain.
G Suite 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 G Suite referral link. You get 20% off your first years invoices from Google, with a voucher code from Dev Guy.
Dev Guy 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 Dev Guy. Skype or Google Hangout sessions can be arranged to demo software.