Numerous questions can be envisioned and it all depends upon your choice and if you know how risky would it be if your emails are leaked or hosted somewhere where security theft may breach your organizational privacy, you might face a terrific situation. At the same time, you may come across different solutions too! You can choose freely available services of any email hosting provider or you may approach some professional company offering hosted solutions – might be a reseller. Or the best what you can do is to host your emails within your organization and enforce as much security measures as you can; since you would have complete command and control. All what you would need is to have Microsoft Exchange server deployed within your organization or you can rent it out from a vendor and have an Exchange control panel on top of it to manage your emails. To accomplish this, you may require some professional services or guidance which could help you save time and retain your security and privacy concerns intact.
You can contact us for free if you need some guidance about it