Sum up

You can choose to have a professional address that runs in a different secure network that it will be only for professional purposes, or to have a forward email address that is custom email address which redirects to your personal one. In that case, your existing personal email address remains the core of your professional email address.
Forward email solution isn’t suggested for big organizations or small business. It’s only preferable for freelancers and/or companies of 1 to 3 people where there is no need of great expectations for collaboration system, CRM etc.