There are many ways in which good email hosting packages can be provided for businesses but essentially each company will have a different need. However, every company’s email hosting should ensure security and functionality.
The basic purpose of email is to, obviously send and receive it! But deliverability can be hindered by not having the correct systems implemented. To ensure your business has the best chance of sending and receiving email (that is also secure), SPF, DKIM and DMARC systems should be implemented.